Back on Adderall | ADHD Information

I have been back on Adderall, for one week. I am taking the same dosage that I was on about two years ago, but not getting the same results. I take regular adderall at 3.5 hour intervals throughout the day. 30,25,20,20 and an ocassinal 10 mg dose in the early eveneing. I have tried alterning this bit throughout the week, but it still seems like it's just not right. At times, I feel like it's ok, then other times I feel spaced out, like a zombie, with little persoanlity, just staring at my computer at work for hours, and not cutting up with my coworkers. Although I enjoy, not rambling so much, it seems as though I am a little too withdrawn from the group. I have tried Adderall XR before, and it was great at first, but seemd to lose it's efectiveness over time. I have a one month follow up with my doc in 3 weeks, but would appreciate any advice you all have to offer. Also, my face seems to get flushed and feel warm in the afternoon, Usually about 2:00, and lasts for a few hours, anyone else experience this?