My boyfriend and I had unprotected sex twice around my ovulation period. About 5-6 days later, I started having a brownish/dark red discharge not even enough to fill up a panty liner, that stopped after 5 days with very slight cramping. I recently have had nausea/vomiting & can't hold anything down, & have also been very tired. My period isn't supposed to come for about 5 more days. I have taken 2 home tests & both have been negative. Could I still be pregnant? All the signs point to yes, but I have gotten negative results. I'm very confused. Can anyone help me? Thanks.