So I have a son with someone other than my boyfriend. The father doesn't see him, doesn't care to…

So I have a son with someone other than my boyfriend. The father doesn't see him, doesn't care to know he exists nor has he ever tried to contact me after I told him I was pregnant. My boyfriend has a 4 year old son that he doesn't see, sadly, long story, but anyways, we're wanting one of our own. I stopped the depo about 7 months ago, tried the pill for a month but I forgot to take it so much that I literally think I took 3 pills all month. After that I haven't been on anything at all. I got an ovarian cyst over Christmas and was seen right after new years by my ob and she said it was going down from what it was in the er and she wasn't worried about it but said I'd most likely get more. Said the only way to treat them was to get on bc but because I want another baby, she said that's the best way not to get them. Anyways, sorry so long, I'm getting off track, I haven't had a period since I stopped the depo and I was on the depo for over a year and never had a period. So it's been a while. Then I had a period over Christmas when I had the cyst and another slight one in january. For the past three weeks I've had this...slight pain... annoying pain...pressure thingy in my belly and slight cramps. Like I did when I was pregnant with my son. I've taken tests and they're all negative. I found out with my son when I was 4 weeks. Do u think I'm pregnant? How long should I wait before taking another test?