Hi there Sue
I honestly believe that going to your GP and getting all this sorted out before you change any dosage of your current meds is the best option ~ that way you will have shared your concerns, explained fully how you are feeling just now - including the 'not sleeping' etc. with your doc, thus setting your mind at ease about the whole situation.
Just so you know, from my own experience going off prozac by cutting down the dose has been easy for me..but you have other health complications to contend with - and checking with your GP first is the wise thing to do
Keep us posted as to your progress.