I am sorry to hear of the trouble you are having and have to say also SO glad you posted this.
I have an os trigonum in my right foot that has been acting up on and off over the past 3 years due to 4 surgeries I've had on my left ankle and I guess because of all the work/compensating its doing.
Right now it is clicking (loudly) and seems to catch, causing some burning in the arch of my foot, but I just had a cortisone shot and it seems to have calmed down a bit.
My OS keeps saying it's a 'simple' surgery and I'd be walking on it 'days after the surgery' and I guess perhaps it is simple compared to what I've had done to my other ankle but it sounds like it might not be that simple.
Can I ask what made you have it removed? I am thinking I am just going to ignore it and hope it doesn't bother me as my other ankle improves - according to my OS leaving it can't cause further damage.