2002 Honda CRV Car jerky going into third gear and now stal

A couple of weeks ago, my CRV started jerking as it tried to go into third gear. If I let off the accelerator and then pressed the accelerator again, it would go right into third. It was low on transmission fluid, so I topped it off. Prior to checking the fluid, it was happening almost every time I drove it. Now, it happens only 1/4 of the time. I don't know if this is related or not, but yesterday it worked perfectly and then all of a sudden died while I was stopped at a stoplight. I make it home, but only by keeping constant pressure on the accelerator. If I let off the gas at a stop or trying to drive/reverse out of "park", it dies.