Your stomach was just horribly abused. Of course it still hurts!
The type of laxative could be giving you the rumblies (gas). Bisacodyl will do that. I was given liquid senna and had no particular problem, other than we all have more gas now because even if you can burp, it doesn't ALL come up anymore. You may also just be using too much laxative. You might try Miralax. It just mixes with any liquid and doesn't taste too bad.
Sounds like you are doing quite well. Congrats!