I have been taking prozac for the last year and a half. When i recently went to the doctor I told him how I have been tired and gaining a lot of weight since I started taking it. I few days ago he gave me a Rx for Wellbutrin. He wanted me to take 150 a day for 7 days then 300. I have been taking the 150 for 3 days now and starting today (3rd day) I feel down again and keep crying (like before i started taking the prozac). I have to go to work tomorrow and dont want to be crying there for no reason. Would it help if I took 2 of the 150 or a 300?