I sometimes get a crampy type pain afterwards, and it lasts just a couple of minutes, but the other night I got a pretty big stabbing pain right afterwards. I think that it was some sort of spasm.
Fruitgirl, that's a good idea to just do it on those two nights. I have been every other night, and in the past week every third night. I may try your method of picking the same two nights.
Chinamom