Diagnosis

I’m 51 and have been diagnosed over the phone with high level social anxiety. However, looking back I think I’ve always been a bit different. Biting my hands to deal with anxiety, becoming hyper sensitive when in a difficult situation, and also only feeling comfortable in small groups. Is it worth me potentially getting diagnosed now or am I just looking for an excuse why I’ve never stuck at anything and find it so hard to face new situations?.  You won’t offend me, I would just appreciate an unbiased opinion.