pushing myself through

I am proud of myself.  Again, I am breaking through my physical barriers and it feels really good.
For the last while I've been trying to teach my body to jog/run, I've usually just gotten to 2 or 3 minutes at a time and my breath feels like its about to run out, like there is no more left.  Then I slow to a walk for a few minutes, then go back to a higher speed for a few cycles.  It was okay, but for a while I wasn't getting past the no breath thing.  I got up to 5 minutes at some point but it seemed random and it didn't last.
A few days ago I made it to 6 minutes.
Today I got to 13. It feels so good.
I felt the no breath thing and went through it and i watched it subside, it ended up being irrelevent.  I'm passed it, I don't feel bound to that limitation anymore. So interesting.   At the point of pushing through, I thought about being in labor and it felt similar--the feeling of knowing I NEEDED to keep on going and letting my thoughts of anything else go.  The circumstance demanded that.  Its different with this because this is totally voluntary but it makes it easier setting a goal.  I made a distance goal and I stuck with it until I made it. Yeah!