Before i started my period, i had some cravings and felt nauseated. i got my period but it wasn't like my normal period, first day was ok then the following were brown spotting and somewhat pinkish. i felt nauseated again, and im still spotting. I had an upper respiratoy infection, could this be the cause of my nausea and irregular period? or could i be pregnant. my boyfriend and i don't use any type of birth control. he does the withdrawl...