l infection went away but spread to my thighs?

ok I had a l infection at first it was just red and itchy then it swelled like crazy in became unbearably pain full I couldn't even walk. it started peeling and bleeding and it only targeted the and lip area.. i was tested for every std but came back neg at first they thought it was yeast infection but there was no yeast and every yeast treatment failed. i had this for about a month and a half. eventually i treated it with neos and it slowly went away. think all i have there now is a UTI. but right before it healed i developed a rash on the inside of my thighs, i thought it was just a heat rash so i treated it with my kids dipper rash cream. but it just gets worse . using neos noe but it started out itchy and then it started swelling and now it its peeling bad and bleeding.... i've been avoiding clothing down there so its now an allergic reaction to cloths and my doctors cant seem to figure it out.. i've got kids to take care of please someone help...