Hello I've been taking Prozac for over 3 months prescribed for anxiety and insomnia, initially it worked great, I felt and slept better, was rather indifferent to everything happening but now for about a month I struggle with sleeping again and I constantly have weird dreams, it's like I'm half awake and not in deep sleep, my palpitations are back and I get obssessive thoughts. Is it possible I developed tolerance to medication so it stopped working? Will my psychiatrist change medication? Tnx