Honeymoons cystitis 4 weeks pregnant

I just found out I’m pregnant yesterday and I have “honeymoon cystitis” so the liner around my bladder becomes inflamed due to bacteria after sex sometimes. ANYWHO can not get ahold of my urologist and I feel like this is turning into a kidney infection and I’m terrified I will lose this baby 😭 Is there anything pregnancy safe that I can do at home until I get an antibiotic?