Tapering off Lexapro and starting Pristiq

My Pshychiatrist has me cutting my 20 mg Lexapro for 6 days and while I do that I am starting 50mg of the Pristiq. I also take Depakote and Buspirone and Wellbutrin. I feel like I am taking so much and that makes my anxiety worse. I'm supposed to take Propranolol as needed for panic but I'm scared to take it. Today is day 5 of the med change and I'm feeling weird. I feel tired and kind of out of it and really anxious. Is this the Pristiq or cutting the dose of Lexapro making me feel weird?