I had a really painful stitch in my W9R3 run and kept going as I was nearly at the end and it was my second attempt at the run. It was so painful I thought I'd ruptured something but it did pass and I carried on. Now every time I run I get a stitch about the 20-25 minute mark in exactly the same place. I can also feel a bit of pain/ache in that area at all times. I rested for a few days (missed one run) after it happened again. Has anyone else experienced this? Will it go away?