First hugs and healing vibes. Your reaction is normal, you are still in a state of shock and it takes time to integrate everything that you are going through. Speak with your team about questions and concerns, once you have a treatment plan in place, and things start moving forward, you will start to feel like you are more in control of what is going on. You may even want to get a 2nd opinion. Yes once you get your diagnoses it seems like every little medical issue crops up to taunt you.
Best of luck and keep us posted on your progress.