What if a UTI goes undiagnosed? or can it? PLS V SCARED?

it would not go undiagnosed for a long time. ive had a uti before, and you have symptoms such as burning, itching, redness, cramps, fevers, etc. and if any of that occurs you should be letting your doctor know so they can urine test you for a uti. i would trust your doctor if she says not to worry, however if it continues for another week i would ask her to check.