ULTIMATE TEAM BUG

I must have encountered a rare bug….. and it’s drastically unfortunate that I had to come here and have to type this. But I lost my Myles garret 96 ovr for no reason. Payed 145k credits for it and everything. I was clicking on him to see if I could apply a team captain upgrade and outta curiosity clicked on sets to see where I could put him… I clicked cancel. And now he is gone…. I haven’t been able to sleep because of it… please help.