I am currently being treated for a uti. can you bleed a lot, and can blood from uti be in under-ware? i first had symptoms 2 weeks ago, ignored it. i was given keflex. i am on day 3 of antibiotics. should i go back in?

Blood in urine without burning or pain is not usually from UTI and is often treated as such. Pl see a Urologist

If you have a documented UTI (with typical urinalysis findings and positive culture for a UTI-causing bacteria), and if the UTI is limited to the lower tract (i.e. not involving the kidneys), symptoms should be improving within 3 days of starting effective treatment. If uncertain, maybe "go back in" or at least call your doctor's office. You might need a different antibiotic. Good luck.