Hi, I had unprotected sex the day before I got my period. I got my period on the 5/18. These past few days about 4 days now, i've been cramping. I usually do not cramp unless I'm getting my period the next day. I'm more tired than usual, a little nauseous, not bad though and bloated. Could I be pregnant? I got anxious and took a pregnancy test today although I know the results won't be accurate because it's way too early to tell. The test came out negative. What could this be?