Hey girl - hold on here - you haven't "done" anything! you had a great, wonderful day, and even shook your bootie! And you sweated - and grabbed some ice. This sounds extremely normal, and happy, to me.
Your hand's reaction to the ice sounds like you might have, um, RSD? DEEP BREATH. You're in the right place. You are still a mom to 3 beautiful children. And you got all that miserable MRI stuff taken care of already. Stick to your plans: your vacation, your appointments, etc. And if your pain is back? Call your doctor and get a new pain prescription. Don't suffer needlessly. HUGE HUG.