false negative?

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I have no clue how to start this post. Especially without sounding unknowledgable and foolish....

Basically, I haven't had my period since October27- November 2nd. I took a pregnancy test just the other day. It was a First Response. According to it I am not pregnant. I didn't use it on my first pee of the day though..

Last week I had bled and thought it may have been implantation bleeding. It was more creamy and pink than a normal period ever would be, and lasted for 3 days off and on.

I have had unprotected sex since my last period, dumb I know. I also have had shooting back pains, stomach cramping, and sensitive breasts( which never happens with my periods).

There are two other reasons I'm wondering could be factors in this: I overdosed on Paxil about 3 weeks ago to commit suicide. I have also done cocaine and amphetamines this month, but not in large quanities. But after some extensive googling I found nothing about drugs delaying a period.


Could it be the drugs/o.d. or a faulty reading?