Hi, I slept last night with the fan directly hitting me and I had little clothing on. I woke up feeling nauseous and I can't help but think it's the cause of the fan? I have vomited twice in the last hour. Normally, I wouldn't be so nervous but last week my menstrual period came 3 days late and only lasted 2 days long, however, it was a very light flow. I have been on birth control pills for almost a year now. Should I be concern if the nausea is related to possibly pregnancy even though I did get my menstrual period last week?