I'm so confused

Okay so my husband and I have been ttc for 7 months now. I had what I thought was my last period in March. I spotted for 10 days! That's not normal for me. And now I've been completely absent of my period for almost 3 months. I went to the doctor over this and she wanted to put me on provera. I've never missed periods in my life. I've taken 5 tests since March and all were negative. And my gyno did a blood test on me and it was negative. Well I took a first response test the other day and it was very faint but it was positive or at least I thought. And just the day before yesterday I took two dollar store tests and both were negative. I just dont understand how this could happen. I'm so confused. Anyone have any advice? I'll post pictures of the tests. I haven't started the provera yet because I am so confused. Please help. And please not these pictures were taken within the time frame.