Having Difficulty Focusing. Feel Like A Little Off Balance, Almost

Having difficulty focusing. Feel like a little off balance, almost like I'm floating at times. I drift off into a daze for short periods of time. Some minor headache pain in the front of my head behind my eyes. More of a pressure than pain. I do take 20 mg of generic paxil for anxeity and depression. I've been on it for over 25 years.