Well I had unprotected sex for the first time and 4 days later I went to get the plan b pill and I also got the depro provera shot on the same day so 5 days later I had unprotected sex again and my last period was on Sept 7th and was due today Sept 29th so I'm scared that maybe I had sex too soon and I can be preagnant or is it just the side effect of taking two birth controls at once.