Just had a nightmare run. Week 7 run 2. I could only run for 11 mins then had to walk for a minute before running for a further 10 mins and then that was it I couldn't run any more. I was so hot thought I was going to expire. Should I start again? I have completed week 7 run 1 earlier this week but today it felt like a run to far. Have I left it too long in between runs? Thanks for any advice.