I had unprotected sex on the 15th August, however I started bleeding 0n the 17th of August due to not having sex for 11 months. I bleed heavily for 2 days. My normal period is on the last day of every month and it is always consistent, however, I didn t start my period on Monday and for the last two days I have been off my food and I m getting this strange bubbling feeling in my stomach. Although I feel it s gas at times, I m still getting the bubbling sound. Could I possibly be pregnant, mind you I did a pre nanny test on Tuesday afternoon and it was negative, could I have possibly done it too early?