My heart is with you Chantou. Dealing with cancer myself, it can be unnerving. I see you have asked for prayers, so you are a believer. That's very cool. I try reminding myself to trust in God, He knows what's going on, and is in control. I personally find real comfort in that knowledge, and able to more calmly face challenges.
I look forward to hearing about successful surgery. God bless you!