First time snake owner

[Sprinx]

Hello all..I am Sprinx, or at least my snake was..She passed on just a bit ago and I am not sure why..She was my first snake, a fancy corn snake, about a year and a half old..I had just fed her a pinkie earlier this week and she was lively while I held her and after I put her back in her tank..She has log houses, vines, and a branch to climb on, with aspen bedding..I noticed her earlier today in the corner if the tank and then tonight she was in the same spot but her scale tone was darker, so I checked on her..She had regurgitated her food and the tip of her mouth was dark..I am curious if anyone here has any opinions on why she would have died so young..