So I've gotten possible positive pregnancy tests, 2 to be exact, (very very very faint lines, questionable really)! I had nexplanon removed march 24. I haven't had a period since feb 9. Didn't get one in march. (They have been super irregular, period before that was June 2016). In usually a reg 28 day cycle. I think I would have conceived march 12, before implant was taken out in, in order for these tests to be truly positive. But according to this app my fertile period would be march 25. I did the deed. I'm having some cramping, almost like my period is about to start. So question is, could this be implantation cramping or is my period about to possibly start? Anyone go through this?