Hahaha, girl you such a mess. <3 Try to relax, and ENJOY your snake! Even if he does regurgitate, guess what? You learned a great lesson and can always try to feed again when you're both ready. I imagine handling a snake like that within several hours of eating is probably similar to someone giving you a piggyback ride after you've had your fill of Thanksgiving dinner. Not very comfortable but it won't necessarily make ya barf. And if it does, you'll be OK too!
Hope all went well at the hospital!