Running away from infertility

I wanted to post something quickly while I was working on second part of my pregnancy loss story.  When we were in the midst of infertility treatments, I did a lot of stress eating.  My weight fluctuated quite a bit as a result.  In fact, after my loss and during my subsequent pregnancy, my weight reached an all time high; I still can't believe I let it get that out of control.  I have been slowly losing weight after the birth of my last child (who I will refer to as B from now on).  Since her birth 15 months ago, I have lost about 45 pounds (and I only gained about 25 during my pregnancy), but I am still about 25 pounds away from where I would like to be. The only way I have ever been able to lose weight is by running and cutting back on my eating.  When I'm angry, running is a huge stress relief.  I'm sure it has something to do with natural endorphins and a runner's high, but the truth is, I haven't found any other exercise that is as effective as running.  I think I enjoyed it so much because it didn't require much thought (like other more complicated aerobic exercises), and I could completely lose my self in the repetitiveness.  My mind could wander, and in a sense, I was literally running away from my problems.  The problem is that now I can't seem to find the time, the motivation, or the energy to run.  And I'm still breastfeeding, so that ties me down a bit.   So I'm curious, how do you best manage stress and keep yourself healthy?