Helloooo everyone

My name is Tracy. I guess I'll start from the very beginning of my situation.
Last November I got pregnant and me & my boyfriend decided to have an abortion. The abortion took place at the beginning of January of this year. So, it was about 9 months ago that the procedure was done. I went on birth control immediately afterwards. Well, about 2 months ago me & my boyfriend (same partner) have decided we are going to try and have a baby. I've been off BC (nuva ring) for 2 months now. Well, my period was supposed to start yesterday, but it never came and today I've had slight spotting. I have taken 2 tests which both came back negative. (but it was in the evening when I took them). I don't really have any pregnancy symptoms, except extreme tiredness. I seem to be yawning multiple times an hour and no matter how much sleep I get, I still want more. I don't want to start popping pregnancy tests like candy, but it's so hard not knowing! Any advice?