Upcoming HIPEC and ovary removal - has anyone had this done and have any advice? I'm so worried

I'm due to have my ovaries and omentum removed soon and then HIPEC the same day. Does anyone have any advice, words of wisdom, etc. 

I'm worried about so many things, but i know this is needed to stop the spread of goblet cell adenocarcinoma they found in my appendix last year. 

Any guidance appreciated. 

Thanks