... night I couldn't sleep at all and this morning I feel so sick to my stomach I can't eat. I've also been getting a migraine almost every day since starting the Prozac. Should I stay on the 20mg or go back down to 10? Can only 10 mg help with depression/anxiety? Also, how long does it take to start sleeping better or is this a permanent thing with Prozac? I'm nervous because I have a lot going on the next 5 days and I'm so sick to my stomach I'm afraid I'll throw up.. Somebody please answer. Thank you!