Hi guys, I haven't gotten my period since February 9th. Last week my Dr. Started me on progesterone for 7 days. I took the last one on Tuesday. This morning i took an hpt and came back negative then later in the morning today i had a bit of blood (still bleeding just a little) and decided to try another hpt and came back positive instantly "or a faint line" has anyone been through this before. Is it implantation bleeding? I'm so confused being that I already have a son.