Will a probiotic help with my stomach swelling and bloating?

I had a tummy tuck last Jan. and Lipo in April. Since then I am still experiencing stomach swelling and bloating after I eat; my stomach swells two inches but not when I wake up, it's flat then . For comfort I am wear a compression garment (Flexee). A friend suggested I try a probiotic. I had an Upper GI and ultrasounds of my kidneys, gall bladder and liver. All tests are negative. I could have lipo again but my plastic surgeon isn't sure it will make a difference or help the problem.