Starting again! LOL

I went running yesterday to the track, and I didn't get as much running in as I wanted, but I did run.  I walked for 5 mins (quite fast, LOL) then ran for 10 mins then walked for 5 (cool down).  I was hoping to do another run interval, but I just couldn't.  I knew I could have forced myself, but I don't want to cause any injuries, so I just let it be.  I went into it wanting to do 10, but told myself if I got too tired, out of breath, etc... then I would stop running after 6 or 8 (depending where I was time wise).  I was getting tired after 3 mins, but knew I had to continue.  LOL.  I wouldn't let myself stop after 3 mins.  I kept running, and started to feel less tired, and it became easy again.  The 9 min mark was hard, but since I was so close to my 10 min goal, I wasn't going to stop.  LOL.  I ended up getting a stitch early in my run (within the first 2 mins) but breathed through it and it went away, but I wasn't so lucky when I got the second stitch around the 8 min mark.  That one would not go away.  It got dull, but never actually went away.  I was hurting last night tho.  My legs felt like rubber until I went to bed, and my back and stomach were sore!  I took 2 advil before I went to bed and I'm fine today (well my back is a bit sore, but nothing major and I'm used to a sore back anyway).  Hopefully when I get running on Friday, I will be able to do another run interval.  I might go to 8 min intervals and see how I do with that instead of doing the 10 min interval and not being able to do anything else.  My goal is to do 10 min run intervals with a walk of 2-3 mins inbetween for the Fiddlers.  I would like to have 1 min walk intervals, but I do want to be somewhat realistic.  LOL.