ive been on fluoxetine for 6 days now, was on 75mg of Effexor for 8 weeks and the dr. had me switch directly over to 20mg of the fluoxetine. is it normal to have heightened anxiety and nausea, and feeling of fear from time to time during the day?? is it just anxiety causing this or should I be worried the pill is doing this to me? really hoping this med will be the one that works, was on paxil for 13 years prior it did work, but cause a lot of weight gain, doc wants something different... should I just continue to wait it out?