How Do I Retrain My PC Muscles to Pull In & Not Push Out?

Dear Dr. Betty,
Help. I think I've trained my pelvic muscles to push out instead of in - I can expel one of your barbells easily when I cum but I cannot easily 'stop mid-pee', and now I am peeing when I cough...
I really need a suggestion re: weights or a toy/tool that will help me IDENTIFY and retrain my muscles correctly (I do squirt when I cum, don't know if that is related) there are so many weights and kegel exercisers online, I'm hoping you've got an expert opinion on this.
Thank you so much in advance
N
Dear N,