hi, i think you might have a bacterial infection, or parasite infestation, did your gp prescribe anti-biotics? cheers.
I don't think it's the tummy tuck surgery. It could be hormonal (I'm about your age). Gallbladder disease can slow the digestive tract.
I have a twisted colon, so I've battled lifelong constipation. MiraLax is what works for me. You can feel better. Just mix the powder in juice or other beverage and drink it in the evening. I can't taste it in juice at all, and it dissolves completely. It is an over-the-counter powder, and much more effective than bulk laxatives like Metamucil. When I'm as uncomfortable as you are, I also use a glycerine suppository to get things started. That gives quick relief when used along with MiraLax.