I always get my period on the 28th of every month.. This time around the 27-28 I've been feeling very nauseous, my sense of smell was very heightened, I didn't want to eat or drink anything because I felt like I was sick to my stomach, I had pelvic pain, I had been feeling very fatigued and also diarrhea & with very very sore breasts and they seem to have grown a bit and I even puked a couple times. I missed my period on the 28th of May took a pregnancy test and got a BFN! I ended up getting my period the next day(the 29th) in the night and it only lasted for 2 days usually lasts 4-5 days. Is this normal ? Or could I be pregnant ? Should I see a doctor ?