My girlfriend has missed her periods after we had sex for the first time. She didn't bleed at that time. I took the quick in method because it was hurting her while going in slow. Now she feel unwell and feels sever pain in tummy and the lower part. we had sex on may 8th.  Her periods was regular before this. she should get periods on 16th of this month. Daily she getting vomiting. One thing is here its Unprotected sex. but i didn't release sperm. she getting afraid now. is there any chance to get pregnancy?