(I go by Glow) anyway, I am 95% sure that my menstrual cycle is every 31 days. I had sex twice during ovulation. ( My ovulation was late). I was supposed to start my period 2 days ago. For the last few days, I have been experiencing achey sore boobs, cramps, nausea, moody, and I had a metallic taste for a few minutes then it went away. I feel like I could start my period but I haven't yet. 2 days ago I took a pregnancy test and it came back negative. Is there a chance I could be pregnant?