On my 4th week, yeowch

First time I've ever done c25k and I am enjoying having far more stamina now than I ever did before in my life, it's great.

I'm on my 4th week of this c25k plan, with said week involving 2 minutes running/2 minutes walking. Managed the 2nd of 3 days this week just today.

Only problem I've got now is all week I feel like my knees are overstressed and there's a dull ache in them if I try to use em too much which got in the way a bit today, but I still finished the whole 20 minutes.

Anything I can do besides rest and stopping my streak for a week?