A mentally ill student who died after jumping into oncoming traffic on a motorway was unaware that she was pregnant.
Yazmina Howard had previously miraculously survived falling seven storeys as a three-year-old while in the arms of her suicidal mother, an inquest heard.
The 18-year-old had a history of drug overdoses and suicide attempts when she threw herself from a bridge into oncoming traffic on the M20 London-bound carriageway in Aylesford, Kent, on October 1, 2018.
Her on-off boyfriend stopped a similar suicide attempt less than a month earlier, which resulted in her being sectioned, although she was released after a day.
Kent Coroner's Court was told she convinced medics her latest episode was a blip - despite pleas from her family to have her detained for longer over fears for her safety.
Ms Howard later told mental health workers she was feeling "eight out of 10", and was optimistic about the future.
But 10 days later she killed herself, having been told by staff at Mid Kent College she would have to retake her multimedia course following a fitness-to-study meeting, something the court heard was playing on her mind.
She was also "emotional" following her split from boyfriend, who previously stopped her from jumping from a bridge.
Ms Howard's death came after her mother Maxine's suicide.
The youngster, from Maidstone, suffered multiple injuries but went on to make a full physical recovery, although friends said she was tormented by her past.
The coroner, Eileen Sproson, recorded a verdict of suicide after hearing Ms Howard left a post on Instagram "saying her goodbyes" before leaving her possessions by the bridge and jumping off - despite desperate attempts by a passer-by to intervene.
A post-mortem report found she died of skull, head and brain injuries after jumping from height.
It also confirmed she was pregnant at the time.
The coroner said: "I take into account that Yazmina had previously attempted to end her own life and I take her message on Instagram as evidence that she wished to take her own life.
"It leads me to the inevitable conclusion that the intention was to take her own life."
Ms Howard's family, who occasionally wept and left the room at various points during the inquest, told the coroner they felt she was "totally let down" by Kent mental health services.
Michael Howard, her grandfather, told the inquest: "There wasn't enough care and attention given to her - she was totally let down by a system that doesn't work properly.
"That's how people like me feel."
The inquest heard Ms Howard was not on any medication at the time of her death and was never diagnosed as depressed, despite her mental health history.
Following her suicide attempt in September 2018, doctors said Ms Howard was better off with a package of optional care in the community, having been confident her mood was much improved, the inquest heard.
A serious incident report conducted by Kent and Medway NHS and Social Care Partnership Trust (KMPT) found there was no reason to doubt Ms Howard when she told doctors she no longer had suicidal thoughts and that she was optimistic about the future.
The report concluded "there were no care or service delivery problems".
Ms Howard was spotted on a bridge over the M20 at about 10.10pm by motorist Daniel Curley, who told police he tried to persuade her not to jump.
He told police: "I said, 'Don't be silly, you don't want to do this'.
"But she just looked straight through me and didn't say a word."
CCTV evidence showed Ms Howard spent roughly three minutes on the bridge before falling to her death.
She suffered multiple injuries after being struck by a lorry, and was probably hit by "at least two other vehicles", the court heard.
Boyfriend Mr Jones told the inquest he and Ms Howard had been "on a break" in their relationship in the weeks leading up to her death, following an argument when he found out she had failed to keep appointments with medical professionals despite telling him she had.
He said he received a text from her saying "Hey, I love you" at 10.08pm on the night she died, but added that it was when he saw her Instagram post shortly afterwards that he contacted police.
He denied an allegation by Ms Howard's grandfather he knew about the pregnancy and left the teenager "holding the baby", saying he found out "10 days after Yazmina died".
The inquest heard Ms Howard told a friend she thought she might be pregnant but had not taken a test, while her grandfather said he was also unaware, although his wife "might have had her suspicions".
The coroner declined to make a "prevention of future deaths" report.