At the start of last month, me and my boyfriend were messing about but we didnt have unprotected sex- sorry to be crude now- but he did put it in unprotected but pulled straight out. I didn't really think anything of it until my period was six days early so i went to the doctors and had a pregnancy test which came out negative and again this month i have came on my period six days early, is this normal? Or could i be pregnant? I havent really had any symptoms, i get really anxious and paranoid so its not really helping.