Having been on every known to mankind anti-depressant ever in 40+years, I can tell you that this is a common move among psychiatrists. The same thing just happened to me this past week. I was on 2000 mg of one drug, then stopped and put on 25 mg of another drug. I am feeling fine, but you are not, so let's try to figure this out before you cry a whole river of unnecessary but sure helps ease the pain tears sweets.
Apparently, for what ever reason, the doctor decided the celexa wasn't helping you. Believe me when I say 20 mg of celexa isn't or shouldn't be causing these effects on you. Maybe these spells you are having is the reason your family sent you to a phychiatrist in the first place... but nevermind that.
I do believe that if effexor is the right medication for you, if you can hang in there, you should start to crawl out of your hole in about 3 weeks, and I think that is way too long, but that's how long it takes for that medication and most other psych meds to work. If Effexor is an SNRI, I thinkit is, it might only take about two weeks to start feeling human again.
I have walked many a mile in your flip flops and know exactly what you are going through and it is NOT FUN. Why can't people just understand that and leave us alone? I don't know why they even try to aggravate us on anti-depressant people, but they do.
I love my shrink, trust and respect him too. You need your shink to explain why he is doing something with your medication and answer all of your questions to your satisfaction before any move is made. Make a list of the things you need to know, any questions at all, like is there any other med that I might be taking right now to help me feel better sooner? Stuff like that. You will get more out of your visits if you do. And remember it is your body and mind he is messing with, pssych drugs are very powerful indeed.
Peace and Happiness,
The Sweetest Hippie,