Did you try massaging everything out of her after soaking? Whether it makes her better in the long run I can't say, but I can say getting all of that gas out of her will make her feel more comfortable. There is really nothing to lose by trying. You will probably have to use a decent amount of pressure to ge it started, but once that initial bit comes out the rest will come out very easily. As I mentioned before I have had a very similar thing happen with a few snakes I have purchased that were maintenance fed by the previous owners. I fed them a proper sized meal when they arrived and their system was not ready for a normal sized meal after only getting meals that were too small for so long. They have always done well and went on to be totally normal snakes. I have not heard of the gaseous infection before. In my case I believe the bloating was caused by the meal not being digested quickly enough and they prey item actually starting to rot which gives off the gas. It's up to you though whether or not to try to relieve the pressure. Good luck with her either way.