My girlfriend keeps wetting the bed. Help!?

My girlfriend who I have been dating 6 months is very hot. we have a great sex life. Problem is i the middle of the night I will wake up all wet drenched in her pee. I tell her to wake up and get out of bed.







 She says "what?" I said "You wet the bed again!" Then i have to take my clothes off and take a shower and change the sheets. She starts to cry. But what am I supposed to do with her? Slap her around for peeing on me?
I wake up wet every frikken night and i have to be up at 5am for workand cant keep doign this. Im starting to smell like her pee all the time. I love her to death and hug her to tell her its alriught. But she needs to see a doctor cause i cant go on like this.