Paaaaain !

For last hour I've been having some really bad cramping pain in my lower back and the left side of my lower abdomen (the pain is not going away what so ever), what is this pain and is it normal? I also feel like I need a very bad wee and I feel like I'm about to wee my self but nothing is coming out, I'm 38 weeks pregnant today, I can't have a UTI as I've been tested yesterday, I can hear some watery noise in my stomach as well & I feel sick as hell 🤢🤮🥺🥴😪