Dear, this is difficult for me to evaluate and also, I am not a doctor! But I don’t think that alcohol has anything to with you pain. It seems that you had a UTI which not cleared up with the first round of antibiotics. That happens. But you had two additional rounds of antibiotics, that should do the trick. You don’t have a UTI or a STD right now? You are tested negativ for those? If this is the case then, I would say, you have developed a pain overreaction, most possible related to something psychological. Think about what was going on in your life at the time when the pain started. Often the pain hooks upon something minor physical that was going on. In your case the UTI.
So, don’t blame yourself!