I'm On The Pill And Have An Alarm To Take

I'm on the pill and have an alarm to take it at the same time everyday. I skip the placebo pills and usually have them on the third month to commence my period or the withdrawal bleeding. I took my first pill maybe four hours late the first day after my period and had unprotected sex on the fifth day. He did pull out before he finished but I think I may have ovulated this month and was severely bloated for three days during that time. It's been a week after ovulation and have just noticed I have brown discharge. Could this be a sign of pregnancy?