What is going on?

Ok so a little background. Hub and I have been ttc for a year. I gave up really obsessing over it because it was too stressful. This past cycle we dtd a lot and used pre-seed. I thought for sure I'd be pregnant, but started spotting 3 days late for AF and had neg pregnancy test. I had a horrible craps. I've been nauseous and my down stairs is like sore but haven't had sex. Like the outside, not the inside. It feels like when I have my period but I don't have my period. I had lots of spotting and some clots but never my actual period as normal. I don't think I'm pregnant because of that but I haven't tested since the last one I took a week ago.