So I've just for back from the cinema (new planet of the apes). Anyway it's quite a long film and I had a fairly big drink. Half way through I needed a wee. Obviously. But decided to hold it in as I was worried I'd either fall down the stairs in the dark or get lost and not find the right screen again. So anyway an hour later the film finishes and I go for a very needed wee. But once id had a wee I had what feels like a pulled muscle or stitch on my right hand side of my belly. Do you think its just i held it in too long? (I may have also been holding in a bit of wind 
). I can't stand up straight without it hurting. It's not excruciating but isn't pleasant. Any ideas anyone? Or should i be worried? X