My 96 honda may have a transmission problem?

Has <70,000 miles. Automatic. 3 months ago when I bought it, it drove great. Took it to a mechanic and he said I had at least 30,000 good miles left w transmission. Then after about a month, it started to jerk a little while changing gears (accel and decel). It has gotten worse and worse. I don't think it's revving too much though. Often when I'm driving down a hill, it actually slows down without me touching the break. When I make a turn at slow speeds, I have started to notice some clicking. I took it to a mechanic and he said I needed to flush transmission and change fluid. 125 bucks later the problem just seems worse - even jerkier shifting at the low speeds. In the last three months I've been to four mechanics, replaced a CV boot, serpentine belts, head cover gasket?, front muffler, and now I'm seriously starting to feel jerked around!? I'm going back to the mechanic. Or should I just go to someone else? Do you know what my problem might be???