I have some blood vessels close to the surface, so blowing out through my nose under water can give me random bloody noses for the season. I get your sensitivity too (only outside, not pools).
Get some nose plugs. I tried 3-4 different kinds and finally liked the cressi. When I first started wearing them, I had to adjust them every second lap. Then my breathing improved to not contrort my face so much and I rarely if ever adjust them, in pool or a 2.4mi OW. I like the cressi because I can make them the right tighness and they grip better than those crap plastic or other materials.
I have some blood vessels close to the surface, so blowing out through my nose under water can give me random bloody noses for the season. I get your sensitivity too (only outside, not pools).
Get some nose plugs. I tried 3-4 different kinds and finally liked the cressi. When I first started wearing them, I had to adjust them every second lap. Then my breathing improved to not contrort my face so much and I rarely if ever adjust them, in pool or a 2.4mi OW. I like the cressi because I can make them the right tighness and they grip better than those crap plastic or other materials.
I use these: http://www.amazon.com/gp/product/B0014EVJ06
They have rubber grips which keep them from sliding. I have the same problem.