meds question

hi all, i just wanted to ask about your experience with medication. i'm on zoloft 150 mg and i'm also taking wellbutrin 150 mg. to me it feels hopeless but my psychiatrist said that i'm making good progress at this level and speed, since i started taking medication 7 months ago and have gone up in 25 mg increments since. i just don't want to be on 300-400 mg of zoloft to feel normal again, i think it will suck all of my personality out of me. are any of you on high doses? do you feel lethargic and emotionally numb on it or do you feel happy?