First thing... I usually have very normal cycles but this month has me worried. May 2nd I got my period. It lasted for 4 days. My boyfriend and I had sex on the 13th. I spotted around the 16th or 17th for about a day... but it was brownish? We've had sex numerous times since then. On June 2nd I spotted a few drops of very light pink blood then it turned brown? Even after using the restroom every time that day, there was nothing... I have been feeling naustious and got sick once. (4 days ago) could I be pregnant or are these signs of something seriously wrong?

Have you taken a test yet? If not I think you should... Sounds to me like you might be.