What can cause you to get a urinary tract infection and a yeast infection at the same time. Both are reoccurring.?

Yes. Although their proximity is close, a vaginal yeast infection and a urinary tract infection are two separate infections and can occur simultaneously.
Possibly sex. Recurrent yeast infections can occur from sex with an untreated uncircumcised partner, have partner tested. Also utis if u don't urinate after sex. Recurrent yeast infections can be proven by repeated positive cultures and may require long term (6 months) treatment. Avoid scented/dyed soaps & personal hygiene products. Etc. Shower, don't bathe. No synthetic underwear. Consult your gyn dr.