I'll second that, I lost my first pony to colic and the vet came out straight away and twice a day for 3 days, day 2 we thought we may have turned a corner but then day 3 left us with no alternative that to put her out of her pain.
Best of luck, I hope everything turns out well for you and...
I had a little sec a who I couldn't get a saddle for, had the native saddle company out and it fitted pony and jockey, looked great, never moved and i wouldn't hesitate to recommend them.