Thanks Mike! I hope it turns out to be as "managable" as week 4 was, which scared me a bit too.
On a sidenote, here the numbers on my fastest warmup-5-minute-walk: 0.41 miles in 5:04 minutes doing a 12:26 min/mile pace. It was 0C/32F and drizzling, so I did not feel like going slow even on the walk 
. This was W4D2, so 3 days ago.