Topamax and lexapro

I took Topamax about 6 years ago for migraines, and experienced no side effects. Just started it up again 3 days ago, and I feel like I am totally drugged and my head is spinning, can not drive, can barely hold a conversation, only started with 25mg, and can say that each day I feel a little better, but the only difference this time is that I am on Lexapro and my Dr. said the side effects could be worse till I get used to it..anyone else take this combination? And how long till I can function again?

I passed a kidney stone about 1 month ago & was told that I have another in each kidney. Have been on 200 mg Topamax/day for 3 years. Also they found a gall stone 2.5 cm when they did CT scan at ER. Just had it removed. They had to do a larger cut at the navel so they could get it out, it was so big. I've also been on Lexapro 20 mg/day.
My husband keeps telling me my back pain is a convenience pain and all in my head. I think between a gall stone that large and kidney stones I can rest assured the pain was not all in my head. Dr. put me on topamax for weight loss.
I feel that Drs. don't care, they are much too busy, you have to educate yourself. I passed a kidney stone 4 yrs ago so this Dr should have know not to put me on it.

Migraine Use: Fingers were tingling intensely 1st day AM after 1st PM dose of 50mg. Continues, though not every day and has spread to feet. Recently went off nasal sprays for allergies because of light nose bleeding. I've had a cold, too, but nose bleeds ever since starting this med! Wondering if there's a connection. Only other time I had nosebleeds like this, I was pregnant! Gained weight on Lexapro, hoping to lose it on this!