I'm 5 days late on my period.. I had sex multiple times between the 11th and the 16th. I'm never late on my periods. I did have light spotting today that kind of looked like implantation bleeding. I went to the hospital and they gave me a pregnancy test but it came back negative. I'm extremely tired all the time & I'm dry heaving almost every day. Everyone says I'm most likely pregnant but it might be too soon to know. I've also had a friend tell me that she's went to the doctors and has gotten negative results and then 3 months later was pregnant the whole time. I have a doctors appointment Monday. Would they be able to tell by then if I'm positive or negative?