Accelerated cycle

Has anyone had nausea (at various times over the last 3 days), heightened smell and a slightly lighter AF last cycle and ended up pregnant? I took a test and it said negative. I have about 2 1/2 weeks between cycles so if I were it would be early, 2-4 weeks... but I don't know if I am or not. I don't personally know anyone with endometriosis to talk to about it. Would love feedback from anyone who can relate.