HELP! Should I end this friendship or keep being a friend ?

So my best friend and I have been friends since 13 (we're 26 now) and over the last 4 years she has mysteriously gotten pregnant more than 5 times but Says she lost every baby. I've been there for her everytime even though I never saw proof., Everyone is telling me she has been lying about being pregnant her family isn't supporting her.. but I just dont think she would do anything like that . Now here we are AGAIN ..I just moved out of state last year so I haven't saw her but her due date was oct 31st and she just told me last week she lost the baby. I'm pregnant with my third child due next month and being pregnant and losing your child is something I take very serious . I haven't talked to her since she told me via Facebook because I don't know how to approach the situation. She has been suicidal in the past  ..but If she's lying to me I can't do this anymore.  what should I do?