I've had it!

Jennifer
This may be a long post but I need advice!
​Since my miscarriage last October I've had three periods. 30 days 35 days, and 40 days. I am a masters student and the 40 day one was during a stressful time. That isn't regular for me.  Ok fast forward...I'm on day 39 I've taken tests this last week all negative. Cervix is real high I've been peeing more and had a massive headache all week. I don't feel like period is close at all but I don't know what todo. I feel like I cant move forward. Wouldn't a positive show by now?
​Ps I forgot to record one intercourse below near the 26th.