Two months ago my girlfriend and I had foreplay and I did not ejaculate but was inside her for not more than 15-20 seconds. She got her regular periods in the last month but bled very less except the last day she had a lot of pain and bled alot. The same has happened this month also but 5-7 days prior to her actual date of the periods. She is also facing pain in her thighs and weakness on her last day. Is she pregnant or is she having some other issue with her menstrual cycle?