I've been taking fluoxetine for 7 days now. Was given it for moderate depression. I feel worse on them than I did before! I feel soooo tired all the time and so nauseous that I can't eat properly so then feel even more tired! Normally I exercise a few times a week and haven't been able to because I feel so dreadful. I'm taking them in the morning so far, should I switch to the evening or just give up on them?