I remember doing some excercises but wearing the belt reasonably tight helped & lots of rest. Don't carry heavy loads / baskets of washing etc , be careful picking up baby. eg bend knees & be careful. I got a bit lax & started carrying the heavy washing baskets & not being carful sitting down, rolling over in bed etc when I thought I felt some improvement & I think I put myself back a little. If you are concerned at all maybe see a physio that specialises in pelvic ligament problems. Just don't overdo it.
I did some gently pelvic exercises, the ones they teach yo in the hospital, but not the leg raising ones. Mainly tightening of muscles, hold & relax. Otherwise you are trying to use muscles that are not recovered yet.
Mum 4 1/2 boy & baby girl 12 months (on Dec 21st)