Running...My Favorite Thing in the Whole World!

I attempted to run last night. Did the 15 second intervals that my teammates told me to start on. Boy was that hard. 15 seconds of running (when you don't) is a long time. Still trying to figure out why my legs stiffen and cramp. My shins were hurting while walking/running too. I stretched really well, but guess not well enough. Ugh...will I ever be able to finish the last leg of the Tri???????? About 9 weeks left before the big day (so basically 8 weeks of training). I have got to get this figured out...