Away on union business

I'm a union member and frequently travel and volunteer my time for my fellow members. I enjoy the work mostly, but lately I'm feeling really tired. I am teacher, my local union president, serve my state affiliate in other capacities, have a fairly new husband and a house we are trying to remodel. Have I taken on too much? How to other 30-something women balance work, home, partner? I don't even have kids! I was filling out a survey the other day and I couldn't even think of anything I do that I enjoy any longer. I eventually remembered a few things, but I'm swamped. Any advice? Is anyone else feeling this way? How do people deal with stress and the increasing amount of responsibility?