I'm very sorry for your suffering and painful medical condition. My dd had surgery on her nevicular bone too. She had it removed too. Take a breath and let your brain slowly process all this information that has been thrown at you.
Number one, are you happy with your foot surgeon? We went to a sports surgeon who specialized in hand and foot surgery. My dd actually had 2 nevicular bones in her foot and the outside bone had detached from the tendon that held it in place. It had to be totally removed and her tendon was reattached to her inside nevicular bone with metal screws. She's flat footed and 10% of all flat footed people have a double nevicular bone. It doesn't become a problem unless you are very active. She had a boot and crutches, then just a cast, for 6 months. She recovered, rehabbed it, and went on to win state champion in breaststroke.
You have to have the surgery or you will be in constant pain. You need to be comfortable with your doctor. Just take it one step at a time, no pun intended. The worst part will be immediately after your surgery. Then it will get better and better, as you graduate to no crutches and a smaller cast etc.
You can do this. Just arm yourself with information. Best wishes for your recovery and please post more for support, if you feel comfortable. Casey