My period came on the 22nd of oct and it went off the 24th or 25th of oct. After that the last day it went off it turned brown and then it went off. My period usually lasts a week but in oct it didn't. It lasted only two or three days. I am tired more than usual and I feel sick after I eat certain things but I don't throw up or anything. Also certain smells get to me. Could I be pregnant or is something else wrong with me?