Well, I did Paxil and it was fine after a couple of weeks. Getting OFF of it is pure hell, though.
I'd give it another coupla days.. then call if it doesn't go away. You may need to cut the pills in half and taper back up.. but it does take 1-2 weeks to get used to it. Don't.. do not.. stop taking it. You have to taper off. Paxil withdrawal is not fun, believe me.