Recovery time

How am I going to make sure I am getting my mileage in when I had my gallbladder remove almost two weeks ago? I was suppose to have done 15 miles this weekend well that didn't happen. I'm trying not to beat myself up over my mileage because my body isn't ready to run yet let alone do 15 miles I did 5.5 on Friday and had to break it up my insides hurt and it was painful. 

My goal for dopey is to beat my time I did last year for the goofy. But not being able to run for a month is killing me and it isn't even two weeks out from surgery. I am able to walk so i do but it's not a lot. Patient is what I need I don't want to hurt myself more and not be able to run at all. So slow going it will be and I'll see how I do at for the 10 mile monster dash in three weeks.