Scared to Death ??

hi my name is amber , in febuary i completely missed my period , and started getting reallt nausea and throwing up actually thought i could be pregant since i have never had a child i dont know whats going on?? everytime i eat i got sick and my dad asked me one day if i was with child , so me and my husband got the test at home and both of them came up negative . well still didnt get a period and its march now and started to sopt very lightly for three days and then it stoped on and off . well it finally stoped so me and my husband had sex a few days later, for some odd reason lights were off and i tht i was really really turned on cause i thought i was secreting everywere. well its wasnt , there was blood everywhere , shortly after he went to work i started to get these severe abdominal pains that kept me up all night till four am crippled over in the bathroom crying my eyes out, the pain subsided long enough for me to get one hour of sleep. then it started again so i couldnt go into class that day, i couldnt move at all i stayed wrapped in a ball of blankets because i was sweating and freezing so cold that i had goose bumps all over my body.i refused to tell anyone about it but my husband who wanted to come home and take me to the er but i refused because i figured it would pass well my mom who is an RN got pissed because she thinks it is possible a misscarriage or an etopic pregancy and that i need to go to the doctor but today is thursday and i feel no more pain . my belly is just really tight and sore still and my back is killing me!! i am so scared to death on what is going on does anyone out there have anythoughts on this???