My girlfriend and I were in my car and we started messing around and then she wanted to have sex, but without protection. Well I onyl got a little bit in when I stopped and we tried once more but once again I only got a little bit of the way in, like I only got the head in and only a few seconds each time. Could that get her pregnant? I mean she started her period the day after it happened, which was today. The doc said we should be fine and we dont need the morning after pill. Any advice????