Pregnant or not

I was on birth control kept forgetting to take them, and I had irregular periods until I started taking bc. In august I had a period 3 times in the same month the first one was heavy the second light and not much and the last just having the feeling I...

was still bleeding. I went and to a test at planed parent hood the test came back negative and it is like my lower belly is getting hard and I try my hardest to suck it in, to see if anything changes, or maybe its just in my mind. Any advise?

It's the messed up hormone levels, if you cant take pills consistently consider the patch or the depo shot... and start using condoms, that is smart anyways
It's probably in your head... take another test if you're still worried

You had that many periods because you weren't taking your pills properly, that's what happens. It sounds like you are just paranoid and that's where the symptoms are coming from. You need to consider a different form of birth control.