colon cancer and "wobbly" tummy

i had surgery for colon cancer and am receovering well.

it has spread but i am dealing with it a step at a time.

i am slim, but after surgery 7 weeks ago, i am left with a "wobbly" tummy.

When i walk i have to hold my stomach still or it moves side to side!

i don't think it can be doing me much good to be honest.

does anyone have a similar issue and how can i deal with it.

i have asked the gp, encology team etc and they just shake their head.