HELP!

Calling all mom's who have successfully potty trained recently. I need help. The first week and a half of potty training (although exhausting) went well. Athen only had a few accidents and he was doing so well. It was a positive experience and he was happy to go potty on the big boy toilet. In the beginning we were bringing him and he was going on demand and then he started letting us know when he needed to go. We finally started leaving the house and I was a little worried but still we had success. He stayed dry all day, he went potty at church, at the mall, and my moms house and was doing great.

Then he started going through a phase for a day or so where he would say he had to go and then sit down and wouldn't go. He did this for a day or so, wanting to go to the potty every 15 minutes. The last few days he has refused to sit on the potty. He will not go to the bathroom. He holds it in all day long. I know he needs to go because he dances around and holds him self but he will not sit down. When we bring him to the potty he staightens up his body and wouldn't sit down. He won't take bribes - no candy, toys, movies, vitamins, stickers anything. Eventually after way too long he wets his pants. We have tried having him take off his own pants and putting them in the laundry and putting dry ones on but he doesn't want to do that. We have tried leaving the wet ones on which he doesn't like but that hasn't worked either.

I have been giving him tons to drink and am trying to feed him things like prunes (because he is way constipated at this point). I am worried he is going to damage his blatter (which happened to me when I was pregnant with him and the doctors wouldn't let me pee, it was a painful experience).

Any advice???? Please help!