diastasis recti ?

I haven't gone to my dr to assure that i have it but i have self diagnosed it because i have about a 2finger gap in my abs and i was just wondering if that is a big enough gap to get it repaired? i have had 2 kids (c-section) and i have some belly hang or what some people call a "mom apron" and i just cant stand to look at it. im only 22 and my body looks like it belongs to an elderly person. i have been exercising but so far it hasnt helped in gettin my stomach any flatter. it looks as if i am 5m preg. i do get lower back pain if i sit for a period of time without moving and occasionaly when i lay flat on my back i get pain in my lower back.