I'm 32 weeks so I know I need to start doing kegels more regularly but how do you know if you're doing them right? I know they tell you to squeeze like you're stopping a flow of pee, which is fine when you're actually peeing, but it seems like after a second or two I can't feel if the muscle is still contracted or not. am I doing them wrong? Any tips on how to be sure it's actually working? thanks :)