We had sex 4 days ago (12th june 2:00pm) i am 19 and my girlfriends 19 , we didnt use protection and i didnt ejaculate inside her , but i cummed before having sex and am scared of precum getting inside her , she was supposed to get her periods by 15th june (yesterday) and she was getting them regularly for past 3 months and its 16th night and still she didnt get her periods , we didnt have sex for a long time too it was just for 5 mins as it was our first time and as we didnr have protection , we are scared now, can you please help us