Ok so for the past 5-6 months my cycle has been so irregular and varies in color. Some times pink, sometimes brown. Stays on for 2 days sometimes 4. Had two in one month, none in the next. Some came every 15 days, others 30 days. I have never had a problem with my cycle until now. I didn't think anything of it for the whole 6 months until now. I'm starting to feel nauseous, sore breasts, sensitivity to certain smells, cravings, even something that feels like movement in my stomach but can't figure out if its just gas. I'm starting to gain weight in my stomach area as well. Could I be pregnant and not know it?