Husband had secret surgery
Husband (46) and I (42) have been married for 20 years. We do not have access to each other's phone, email or social media accounts due to a previous incident involving a family member (that's for another day). Yesterday while he was at work, I used his computer to check our bank accounts and he had his social media opened so I took it as my chance to see what he's been up to. I found messages between him and his brother coordinating rides to and from his surgery. He had mentioned he will be knocked out for it so it wasn't a simple Dr visit.
These messages were from a couple days ago. On a day that I realized it took him almost the full day to respond to me while I was at work. I remember when I came home that day, he acted normal but his shower before bed took an hour when it usually would take 15mins. So now I know he had some sort of surgery he is keeping away from me and is planning to take it to the grave like he's done in the past about other smaller things I found out.
I don't even know how to react. I was disgusted and felt so betrayed. I couldn't even stand him coming near me or touching me. He did it without even telling me, the one person who it would affect the most on this planet. What if he had complications or worse, passed during surgery? Did he think surprising me with that would've been okay? I feel not only betrayed but as if I'm not even his first choice when it comes to things that can cause consequences that affect me primarily. As if, I'm just another person he lives with, not even more than his own brother. How would anyone feel if it was their spouse? Or am I overreacting?
Tl;dr - husband had secret outpatient surgery and only told his brother. How do I move on or am I overreacting? Thank you!