That makes sense. But I think nosebleeds at altitude have to do with low-density air being dry, which dries out the mucus membranes inside the nose when you breathe. It's not a direct effect of the pressure change.
Did you ever mention that incident to your gyno? It's probably worth making sure they're aware, even at this late date.
I hesitate to bring this up, because it's one of those things we fans can be obnoxiously evangelical about, but...have you looked into a Diva cup/Moon cup/other silicone menstrual cup? My heavy flow used to require tampon changes every 2 hours, but I can easily go 12 hours with the cup. I also don't need to bring boxes upon boxes of menstrual products on a trip, because it's reusable. Just a thought.
Did you ever mention that incident to your gyno? It's probably worth making sure they're aware, even at this late date.
I hesitate to bring this up, because it's one of those things we fans can be obnoxiously evangelical about, but...have you looked into a Diva cup/Moon cup/other silicone menstrual cup? My heavy flow used to require tampon changes every 2 hours, but I can easily go 12 hours with the cup. I also don't need to bring boxes upon boxes of menstrual products on a trip, because it's reusable. Just a thought.