My gf missed her period after her third month of taking belara. she is almost a perfect user. we had unprotected sex, but used withdrawal. pregnancy?

Probably not, but...: Can do a pregnancy test. Home pregnancy tests are very accurate and not affected by foods, herbs, common illnesses, sexually transmitted diseases, vaginal spotting, or medications. A test gives a reliable result 3 weeks after sex (3 weeks after when conception might have happened). If done sooner, a negative result may be due to testing too early such as less than 2 weeks after conception.