Hi @Tammy9, everyone has given you great advice. The main thing now is to put yourself first.
Don't worry about other's feelings as they can manage that. This time is all about you and you can't be responsible for everyone else. One step at a time, one day at a time.
Surgery and treatment are all in stages and in a way this is best to get through it all. Take someone to your appointments. Ask all the questions you need to. Stay away from Google as it just causes stress and you don't need that. Treatment is great these days and there is so much success.
Do all the things you like to do and take in a bit of exercise as it helps prep you for surgery and helps clear the head too. Breathe deeply and know we are all here to help you through this. Sending you a big hug xx