TMI alert...

Okay I was supposed to start my period on Sunday May 31, but I started spotting light pink and very light spotting on Monday June 1. By Tuesday June 2 I had a little bit more bleeding and it was a little darker, but not normal. My normal period is very heavy, having to change my tampon every 1-3 hours. Now I honestly don't think I need a tampon because I can wear it just about all day without changing it. I do have some cramping but normally it is quite painful because of my endo. I also usually have significant blood clots that are deep red, though I do have some clotting it is not as significant, actually quite small and it isn't deep red. I took a pregnancy test Sunday May 24 due to some severe nausea and it was negative. Then I took another on Tuesday June 2 because of my skipped period on Monday, it was also negative. I'm trying so hard not to get my hopes up. We've been TTC for a little while now. I keep telling myself it is my period and I'm not pregnant. I'm still having problems with nausea and tender breast. But it is common for my period, the nausea isn't normal but tender breasts are. I don't know what to think. Nothing about this period is normal for me. Any advice is appreciated... I don't know what to do, I don't think I'm pregnant but very confused...