My girlfriend periods starts on 4 to 7 every month and last for 4-5 days. My were intimate on jan 25 but it was not intercourse but we rubbed genitals. She missed her period. Its 6 days delay. She had blood in urine on 7,8 and 9 feb and some vomiting. And has mild pain in stomach. We did a home pregnancy test on 12 and 13 feb, both were negative. But she hasn't got her period till now. I am worried. Please guide me.