Lisa-- Congtats on 21 days. That's awesome! And, yup, you are doing the right things with the meetings, sponsor, exercise, vitamins, etc.
Everyone is different, of course, but I can share my own experience. I could barely get out of bed the first 30 days. The second month I felt a little more normal, but then wicked insomnia kicked in. It took about a month for my sleep to get better. I also had severe depression for a couple of months b/c my brain chemicals were so out of whack. At three months, I felt better physically and mentally.
My motto for the first few months was, "every day that I stay clean and sober is one day closer to feeling better."
Remember, you're not a bad person trying to get good, but a sick person trying to get well. This means, physically as well as mentally and spiritually, so try to be gentle with yourself. You will get your energy, montivation and hope back, but it may take awhile. My advice is to keep on doing healthy nurturing things for yourself as you heal.
Hang in there, Lisa. It does get better and we do recover.
hugs,
phinny