My boyfriend and I had unprotected sex as we usually do, but on the 29th and 30th of Jan he came inside me. He did it again on the 11th and 12th but my period was originally supposed to come on the 11th and just came today on the 15th. My period started light with blood clots a little bit bigger than a quarter. Ive also been nauseous and having other symptoms since the 6th of feb, I went to the hospital but they only said that I was dehydrated and blood work said I wasn't pregnant. Now my boyfriend thinks I'm miscarrying and I don't know whats going on. Please help.