I bought a binder from underworks recently. I always make sure to bind less than 10 hours and the longest I've worn was three days in a row. I always try to give myself a break and take it off as soon as I can. But, I looked in the mirror and notices thin bruises near the nipple on each of my breasts. three under and three above in the same spots on each breast. Is my binder too tight? Am I doing something wrong?