I'm really sorry to hear about your pig
Must be really worrying for you.
I'm afraid I've not come across this with pigs (had a dog once who got badly bloated, vet reckoned he'd eaten a frog or toad and it had swollen inside him
)
As long as she's still drinking the only thing I could suggest would be some fresh fruit juice/melon/pineapple to try and flush whatever the issue is out of her system. If she's up for it, you could try massaging her tummy to help her pass gas, but if she's feeling rotten she might not take well to it
I could try sending her some reiki - but you'd need to email me a photo of her, your location (not exact, just the name of your town or county) her name and age. My email is kkjmckay@aol.com but hopefully someone will be along soon who's had a similar situation and can shed a bit more light on it for you.
Karen