Hi, my name is Ana and I am really worried about being pregnant I had unprotected sex like 4 weeks ago I took the plan b the next day and 2 days later I started my period it was normal but after iv been having stomach pain feeling sick dizzy kind of vomiting and till now I feel pains and I'm having this weird feelings in my stomach this two days feels like bubbles popping please help me is that from plan b ohh an I took pregnance test 3 days ago and it was negative so please help me