Hi I lost my virginity 4 days ago. My BF said he didn't ejaculate and we used a condom. The day after I had stomach pains, nausea, headache, and I was sore. It is day 4 and I'm really hungry after I eat every meal. I'm no longer sore but my stomach keeps growling. My friends told me not to stress it and I should just wait for my period to come . Should I be worried ?