urinary tract infection
"I've had many bladder infections over the years, to varying degrees-- and Amoxicillin has always worked for me, personally, when it comes to the worst of them.  But everyone is different, so if it doesn't help your infection go away, switch to another antibiotic, but be warned that the current push is to prescribe a powerful class of antibiotics called fluoroquinolone, that have a rare, but potentially permanent side effect of nerve damage (and warning states that the effect can happen AFTER you've taken the medication).  So, given the choice of antibiotics, I'd take Amoxicillin first.  Yes, there are side effects, but minor and temporary.  Just take probiotics, eat well, hydrate."