At age 59, two crashes, two cracked LAS Squalos, and end of riding career. I'm 65 now and still miss it. At 51, you're a kid. I didn't even get good until I was 55+.
And what is this "opioid pain reliever" crap from another poster? My wife is a pharmacist who's had several surgeries in the last 10 years and would NEVER use this stuff for more than a day or two. When I was destroying my body trying to get good, I never took so much as a tylenol.
Pain is manageable, but depression sucks. I don't have an addictive personality, but depression from suddenly stopping riding at a high level is palpable. After a minor injury (before the concussions) I starting driving my favorite bike routes in my convertible. Didn't help much.
Hang in there. Focus on any PT you're getting. And remember - your just a kid.