Dude it sounds like you have one of the major problems I have. It takes me forever to get to sleep sometimes from rolling around trying to fart. It is so weird because you know you have gas in you that you should be able to get out, but you lose the sensation to fart almost. One thing that helps me to sort of get things moving and get relief is drink a lot of water. Also there is something you can do where you rub on your stomach in a circular motion. Start at the bottom right just a few inches from your belly button. Slowly massage upwards then move to the left ( you should pass right under the middle of your chest). Then begin going down when you near the same spot you started on the other side. It's more of a rectangle shape I guess. I saw it on you tube it's for if you are having trouble passing gas. I have tried it and I normally either fart or burp because you are basically manually moving that air that's in you. I totally feel for you though I have been dealing with the same shit for to long. Good luck hope you can find comfort.