Hi @lancslass17, sorry for slow reply - been a bit distracted!!!
It was actually fine. Hope yours will be too!
Blow-by-blow: so we were there at 7:30 for the consultant chats, weight and height, anaesthetist chat etc. Only 3 patients that day due to Covid distancing, instead of 6 normally. We were first as he was the youngest.
I made the decision not to tell him it was going to hurt a lot. Obviously so different for everyone! But he wasn't worried or phased by anything, was enjoying the toys etc until about 9:15 when they came and asked me to strip him for the surgical gown and take him down. He did get scared and clingy then, especially once we got to the day surgery room and there was a big team there, all masked up - they tried to put me in an apron and couldn't get him off me to get the arms on!! So I think for us it was the right call to just say it was an adventure to make his peepee better...
They couldn't get a cannula into any of his hand veins (chubby little hands!) so it had to be gas and air to knock him out, which was tough because he was 90% asleep but sort of physically fighting to get the mask off... I did blub a bit then but they had been so great, so I knew I could really trust them. That's when I gave him a kiss and left.
Then it got quite nerve-wracking because they had said in the morning that it would be 45mins to an hour, but it was actually a full hour and a half before they got me - apparently no complications in the surgery, just took them half an hour to get the needle into his hand! :( But then just as I was getting really worried the surgeon came out to debrief us and a nurse came to get me to go to him in recovery.
Recovery was the worst bit. He was, as @MagnusMama said, howling like a wounded animal. Really hysterical crying, mostly asleep but wild and writhing and heart-breaking. I managed to cuddle him and soothe him a bit but it wasn't til he was a bit more awake that he could calm himself... I'd say 15 full minutes of crazy, can't breathe crying and sobbing :( Finally got him to recognise that I had a bottle of milk for him (his ultimate best thing in life and a rare treat these days) but even then, they had moved us back up to the ward and the nurses there had turned the lights down before he really calmed down.
But the amazing thing was that after that, it only took him about 45 minutes to ask me to get him dressed so he could go and play! The brilliant thing about keyhole surgery is that there's just a plaster on his pelvis, no dressing on the testicle at all, and so I think in a weird way his "surgery" pain is quite minimal... I'd say the tube in the back of his hand was hurting almost as much as the stitches?? They couldn't take that out until he'd drunk, eaten something and done a wee, but from waking up hysterical, it only took him about 2 and a half hours to tick all that off the list. Then they took the cannula out and we were off home again at about 1:45pm.
He slept brilliantly last night and has been good as gold today, lots of wandering about with a funny wide-legged walk like a cowboy :) but very cheery, singing to himself like normal and lots of playing just like any normal day. His balls are bruised and swollen but he's peeing and pooping, eating and drinking just like normal and I think he's on the way to a good recovery already.
The surgeon was very optimistic about stuff, will review him in 6-8 months. I've obviously not got much clarity about the long-term issues but am hopeful. Really wish you all the best for tomorrow, will be thinking of you 

