Had unsafe intercourse on 26th June & taken unwanted 72 within half an hour. On 28th somehow another Unwanted 72 taken. July 10th/ 17th & August 1st urine test done & negative. USG done on 1st August & also negative. Actual period date was almost 1st of every month, very very less period on July 7th only 2 days. Almost normal period on 11th August for 3 days. Now vomiting occurring & lazy feelings throughout the day. Is there any chance of pregnancy? What to do, please help.