Am I pregnant ? Or what’s going on?

My period has been all jacked up this month. I have been having a lot of unprotected sex lately and my normal period is a medium/heavy flow I cramp and don’t eat much never spot or anything either.

I started to spot them started it was very light no cramps lasted 2 days then stoped for 1 day then two half days of hardly bleeding at all very little blood when I wipe and very little to to non on my pads. Before I started I got two positives and a negative test results. I had nausea and sore breast which I don’t get in my periods. HELP?!?!