hi,am sumita..on 12th,13th and 15th of july i had an unprotected sex with my hubby..on 1st of july i had my period which lasted for 4 days..again on 25th july i had my period heavily but just for 2 days.before that from 21st of july i started feeling nauseous and vomiting like tendency with severe lightheadedness..but when my period started it went off..and when period stopped again i have started feeling all those symptoms..but till now i took 3 hpts but all negative..what is this,what should i do..plzzzz help..one more thing i forgot to add i also have itching in my whole body..