I have been on Wellbutrin (bupropion xl) 150mg for over 2 weeks. I haven't noticed a thing. Doctor said plan was to bump it up to 300mg. My question is, since I have many 150mg pills left, can I take 2 of the 150mg pills? I know they make 300mg ones but won't get to my doctor for a couple weeks. Or would it be OK to take a 150mg pill twice a day? Or just one 300mg once a day?