Menstrual cup with vaginismus/vulvadynia?

Bat

Hi guys! I'm going on vacation and me period is expected to come the same time (fuckin' uterus). I want to be able to use the hottub/ have a romantic bubble bath with my girlfriend. Problem is I have vaginismus/vestibuldynia, and have never been able to use a tampon (tried exactly one time and it was awful). I don't have a severe case, but I'm not looking forward to the hassle of trying to get it in, especially when I'm cramping up, but I figure if it only hurts a little I can tough it out just long enough to be in the water for a while.

My girlfriend is getting me the small divacup, is this one soft and pretty small? Has anyone else with vaginismus/vestibuldynia found one they could tolerate?