Well 7 months ago I had my 2nd son.. then 1 1/2 months after I had unprotected sex and my boyfriend said he ejaculated in me a little.. Well I still got my period. Then in February I started feeling weird from my stomach it would hurt just a little when I lay on it but again I was still having my period and I even took a home pregnancy test and it said negative. My periods were the same but had them on different days.. But now I'm getting even more curious because 2 1/2 weeks ago I had my period and when I go to use the bathroom I notice I have some bleeding there but nothing like a period. It's been going on for three days now and also, well this is going to sound weird but I feel movement in my stomach.. At first I was thinking it's just gas but it feels like punching and like it's doing flips.. And now I'm getting these migranes that make me nauseated.. Also I use the restroom a lot lately and I don't even drink a lot and now I'm starting to get lower back pains and works its way to the front

Does not sound like pregnancy, does sound like you should see your doctor.