Hi, since last Monday i have been very dizzy, lightheaded, nauea and having stomach ache. On Wednesday, I started having a running nose and sore throat. I went to the doctor on Friday and he prescriped me clarithoromycin 500 mg 2 times a day. By Monday I was have still been dizzy, lighthead, like im going to throw up and my stomach is just in pain. I m also having black soft stool that smells. The doctor sent me for a blood test to see if I m pregnant but I doubt it and then I did a stool sample but I still don t know the results for either test yet.