Pregnant or not?

Alysia • I`m just a simple girl
I had sex August 5th and I got a light period about a week after and it got heavy with clots. I took a test and it came back negative. Then I started to get bloated, tired, cravings, sore breast and pooping in the morning? I took another test and the line was barley there, but it was a blue dye test and they say not to trust those. I went to the docs and the urine test came back negative then I started birthcontrol. I still have these symptoms and lower cramps a lot, all day. I started spotting but I guess that's normal to start bc, but it's dark and clotty. Any opinions?