I just bought some revas and romy flats from TB and love the look. However, when i wear them, the back of my heels are getting all red and blistered, especially with the Romys. The Revas are giving me pain in the back of the heel as well as the front part of the shoe. I tried a half size up but they were slipping and the SA said I should stick with the size I got. Does anyone have advice on what I can do to help with the pain? i think it's due to the hard elastic on back. I tried putting a heel pad but it's hard to keep in place because of the elastic back. I'd hate to return them - they are such cute shoes! TIA!