If I have a UTI (not under meds) and get strep throat with fever over 101........Joint and body aches with sore throat........Can that make UTI worse?

Possible. Since you are not on antibiotics, your immune system has to do all the work. If you have other infections going on, your body may be weaker allowing the infections to worsen. However, even without the sore throat and joint aches, UTI will get worse over time. Also, with your combination of symptoms, I would get checked out asap and get antibiotics. All your symptoms may be from stds.