My poor python :'( what do i do?

Well first of all that was very bad mistake to leave your snake a lone anywhere and especially in the bath tub. there natural tendency is to go somewhere and hide and they do not know or think about you being able to get them out. It probably would have just came out on his own sometime but then you would probably have lost it somewhere else in your house.If I was you I would contact your zoo and ask for the reptile personel and find somewhere/someone that can look at your snake. It may be fine and then also maybe not but I would get the snake looked at and be sure to never leave the snake a lone again when it can escape. I hope the best for the snake and you. I have a California King snake myself.