Hello my girlfriend and I recently starting having sex. We used condoms every time except for once when and when it started to feel good I pulled out. I don't know if I precomed or what but I know this is not a safe birthcontrol method. Anyway last month she got her period at 33 days and was about 3 days late. Then 10 days later she got it again for about a day. The same day she got her bellybutton peirced and we figured it was brought upon by stress. Now this week it has been 36 days and she still has not gotten her period. :confused: she is young and very underweight only about 98 pounds so is that why she is so irregular or is she pregnant?

The only way to know is for her to take a pregnancy test. No form of because is 100% effective but not using any (the pull out method is NOT bc) greatly increases the chances of pregnancy. If you two aren't ready for a baby, use protection and use it every time. All it takes is once for pregnancy.