OMG! I don't know how but I flippin ran for 20 minutes! So glad I have asked advice on here as I'm sure the advice to run slower helped. I run on a treadmill and usually run at 6.2 (that's my husband's brink walk!!!) but I ran at 5.4 all the way through.
It's an amazing feeling to have done it as I really thought I couldn't. Really feeling now that I will get to the end of the programme and make running apart of my life on a longterm basis