I had bad separation of my stomach muscles after DS2. When the physio checked them before leaving the hospital they felt as though they were 1cm a part, but I kept feeling a bulging sensation & my stomach popping out when I sat up. The physio found that the top was together but deeper down they were still 4cm a part she advised to start from scratch no sit ups as this will push them further apart and to get up out of bed by rolling onto your side to rest the stomach muscles. I can't remember the exact excercises I will see if I can find them it's been a while DS2 is 18mths. I was given a ligature/pressure bandage to wear ie like what you wear on your knee or arm to apply pressure this held everything in and gave my stomach muscles some added support. I saw it recently in one of the boys clothes boxes I was sorting through. Could you get into to see a private physio just as a once off to get some advice? I was about 8 weeks post natal when I had these issues. Please be careful because from memory it can lead to organs pushing up & getting caught when they do knit back together. If you would like the ligature/pressure bandage I will have a look for you... 11 boxes later lol. I got it free on my first session so it's yours for the same cost PM me your details if you want me to find it out for you. Not exactly sure which box as I was sorting the clothes out for selling, giving away & donating.