Sorry to hear about that part. I know it sounds maybe strange and stupid, but when mine happened I fished the chunk of meaty thumb-flesh out of the kitchen sink drain using a fork, soaped it up real heavy and poured peroxide all over it, dressed my own thumb after putting the piece back where it belonged. After that I just cleaned the area several times daily and disinfected. It grew back together and now I can hitch a ride with total pride.
Still doesn't get rid of the 'retarded' feeling that comes over me every time I think about it.
Well I hope it heals up real quick for ya and that it's not hurting.
Me, I'd lie and tell people I got that wound on the battlefield over in Iraq or on a super-secret mission "back in my days as a Navy SEAL." People will buy you free drinks if you go that route.