PMS ulcers

Im wondering if anyone one else gets ulcers before or around their period. I feel like every cycle i get at least 1 or 2 on my chest, maybe one in my mouth. Usually 4ish total. I cant tell if its something to do with my cycle, and/or if I can do to reduce the likelihood. Im on progesterone for hormone control and I take Colchicine for the ulcers. Also if anyone has tips for ulcers that form on the chest/under the breast tissue, I have am so frustrated