I had a great run week 3 run 3 two days ago which was all uphill then walked a further 6 miles that day (touristy stuff-I'm on holiday). By the end of the day my left heel was tired/sore. Yesterday I could hardly put my heel down. I was scheduled to start week 4 today. Feeling disappointed and hoping I haven't done anything serious. It is feeling much better today but I certainly couldn't run on it. Any tips? Thank you!