She looked very thin. How and when had she been feeding? If she didn't eat, and was wasting away, perhaps it was just her last day before dying. I did not see any stargazing moves, at least nothing that to me seemed like it.
It could be POSSIBLE to not show any symptoms for 4 months, but I would highly doubt it. I was always told that pythons rarely live more than a month. Boas were the ones that could carry without dying. Is this true? I couldn't say for certain sure.
Don't panic yet, and just tell yourself it was a CH baby, so it could have been several things unrelated to IBD.
If it IS IBD, then you can deal with that then. Don't borrow trouble.
HUGS and I'll think good thoughts for you. Please keep us updated, and if you have records of eating, or possible regurgitation.