Try the miralax. Its not the cheapest in the world, unless you find it on sale. It helps keep you regulated quite well. As someone else said, many cfers take it daily. I don't because it makes me go too much, but the docs want me to because I have problems with obstructions. Anyway, take a megadose, it will kickstart things very fast, and once things can pass through to the bowel, you can pass that gas like you want to. Normal dose is 27grams(one capfull) with 8 oz liquid. If I blocked (i get severe blockages so I really up the dose) I will take 4 doses at a time, every 2-4 hours. It will pretty much flush things through. It will, however, make your gut super active and it will (at the high dose) take a day or 3 to regulate again. BUT>>>>>>it helps the pain and gets things going. And when things pass that easily, the gas passes too!
Good luck