I am also on prozac and it has really helped as well (of course evreyone reacts differently to AD) when you up the dose you have to go slowly too have the least side effects. I started on 10mg then 20 then 30 then 40 each time staying at least 5 weeks on a same dosage. When I upped the dose I felt mild anxiety for 2 days and insomnia then I was back to normal. Definitly do not stop it suddenly and you should see with your doctor about reajusting the dosage you should not encounter any pb since you seem to tolerate it well at 20mg. good luck stay strong