Its my 4th day on Celexa, and not feeling very good, I tried to t...

Its my 4th day on Celexa, and not feeling very good, I tried to take it at night but still feeling nauseous and feel very spaced out during the day. I also noticed that I have lower energy that usual when it comes to expressing emotions or taking interest in things. The only things I can really do is read, at times hard to concentrate, or i go to bed right away because i feel like i have no energy or interest to do anything else. Also have been having stomach cramps.