In february i had unprotected sexual intercourse with two different guys. since then i've had spotting (which lasted several days), nausea, vomiting, ?

Sexual Intercourse: It sounds like you may be pregnant. If you are six weeks post these sexual encounters and are feeling sick you may be wise to get a urine pregnancy test to see if this is causing your symptoms. If you are not pregnant then please seek out a good women's health expert to find the cause of your symptoms and to also get you on birth control.