About two weeks ago I noticed that when I would start my 04 na it would jump forward abruptly, unlike normal when it eased forward. Then about a week ago I noticed it surging forward when slowing to a stop. Now on acceleration in 2nd it surges forward and in third and fourth it has a very bad vibration (so much it rattles the rear window). Now if I ride in 4th the vibration comes and goes. Also when it is vibrating I almost have to put the petal to the floor to get it to move. It appears it is getting worse. Opinions?

its an automatic, no mods, 60k miles