TTC-late period/bfn

I feel like I’m going crazy! I had a normal period last round, ended up having egg white CM twice 5 days apart this cycle. We did the deed both time plus some here and there. I was suppose to start my period Sunday, still no period. All my tests are negative. I’ve had VERY MINIMAL brown spotting yesterday so I though period was on the way. Nothing til this afternoon, and small spotting today that was brown and pinkish. And now nothing. Still negative tests. Super nauseous. What is happening to my body? Is there still a chance I’m pregnant?