Do not just take medication on your own. You are overdoing it. If you had a UTI, your doctor would find bacteria in a specimen test (pee test). And std' are easy to test for. You are on medication and improving. Doxy can have side effects and self treating is over the top. Your doctors may just be prescribing things to appease you because your anxiety makes you very forceful and difficult to calm down. Keep that in mind. Overdoing it with antibiotics can have repercussions too. So, hopefully you are better by now!