Mouth ulcers...

Does anyone else experience an increase in the liklihood of developing mouth ulcers around the time of their period being due? The last time I was at my dentist I had about 5 ulcers and he said they can become more common during hormonal times, and I'm due my period any day now and I suddenly have 2 mouth ulcers again. I've always been prone to them but it just seems coincidental that I suddenly have 2 when I'm due soon. Anyone else? 😢