I just started taking YAZ birth control on Sunday (5 days ago) and last night and today I've been so nauseous and can't eat. I haven't even taken my dosage tonight yet because I can't decide if it's the BC causing the nausea or a stomach bug. Would I already be experiencng symptoms after only 5 days? And would the nausea only happen right after the pill or continue for days? I really would like to continue on the pill but not if it is going to make me this sick.