Hi haldata,
Welcome to the NeuroTalk Support Groups.

I've never taken Prozac but many years ago I was taking Zoloft for a while. I had the same problem with that. It seemed to hit a wall and I was on a pretty high dose at that time.

You should go talk to your doctor. 14 years is a long long time to be on the same medication and if you've noticed mood changes then it's imperative you have this all checked out.

Whatever you do, don't stop taking the Prozac cold-turkey.

It could be a simple thing like changing the dose again or actually changing the SSRI.

Take care there and all the best with sorting it out.