text: i do not know the answer but i can tell you this, it has happend to me many times especially whne i am in a hurry, i heard shake twice, i shake a lot becasue same thing happens to me, i'll be 21 in 2 months, been happening t me prolly since i was 13 (puberty) (guys dont get UTI ,they get bladder infections , girls get UTI's, asked my doc what difference was, i had blood in my urine once, felt like needles when i went, im not the type to cry, but man did i have tears when i went, i was scared to go!