im a mom and 28 y.o. id like to ask if i have a u.t.i or std i have a foul smelling odor in my vagina,sometimes i experienced lower back pain and sometimes lower left under my ribs pain,i have yellowish discharge and i usually pee and sometimes my discharge increases. whats the prob with me?where did i get this?i have only 1 partner who is my husband. does my husband fool around?whats the treatment for this?