fluid overkill,now what?

[dbgrate]

After a recent thread, where I was given good advice regarding adding transmission fluid(Mobil 1 ATF),I think I screwed up.I added the fluid,ran the car and then would measure the level.After about 2 quarts had been added,bit by bit, and frequently checking the dipstick,the level got up to,say,1/4 inch below the "minimum" mark.So,I added a few more ounces.Next time I drove the car,it felt like it was '"pulsing" or "throbbing".The dipstick showed fluid a couple of inches above the "max" mark! Would the addition of a couple of ounces take the reading on the dipstick from a bit below the "min" mark to way above the "max" mark??? Now I'm afraid to drive it.What are the consequences of driving with excess fluid?Harmful?What should my next step be??I'm hoping this isn't curtains for the tranny.This is a 300SDL.TIA for any help.