Please be careful of how many medicines you are giving her, and at least speak to a vet ASAP - ideally get an emergency appointment. Do not give her any more medicines, she's had enough and too many can damage the kidneys (and, I think, liver).
In my experience, having two pigs with chronic bloat (frequent buildups of gas that are like "mild" versions of bloat, triggered by eating certain foods) the Buscopan works the best without a doubt. One 10mg Buscopan tablet, crushed and syringe with around 1ml of water.
In the past I have tried Infacol (dose was 0.5ml at most, but the bloat was not severe) and had limited success with it. I have not used Rennie, Gripe Water or Dentanox Colic Drops but I have heard that all can be used. However I could not speculate on doses and I would not give more than one drug at a time.
You need to get her examined by the vet ASAP to determine the cause of the bloat, if it is indeed this condition. Sometimes a blockage can lead to bloat, this needs to be ruled out by x-ray before you start trying to syringe feed her or put much into her.