I have been taking fluoxetine for 5 days now for PMDD and I am very tired and just feel weird. And today being my 5th day on this medication I also notice some emotional issues like feeling sad (which was never a problem prior) and I sat in my room and cried for about 20min for no reason and just have no energy and want to sleep.I do have some extra stressful things going on. Is this a normal side effect? Will it go away?