New to MBC. How to stay positive when every Onc meeting seems to bring less certainty?

A good experienced nurse should be able to use a very fine needle. You may want to consider a port - a vein entry point that gets put in place once and is used for blood tests, infusions, whatever. A good nurse or your oncologist can advise. While all the tests are a bit of a whirl, most people feel better just to be doing something!! While it’s important to have faith in your team, don’t hesitate to ask questions or tell them if something is concerning you. Good communication helps a lot. Best wishes for next week.