I know exactly how you feel. I am an optimist but i hurt my shoulder a few months back over training in the gym. It was agony and i was worried that the injury could have been caused by bone mets or weakened bone due to the HT.
But, they had a look with an ultrasound and some old X-rays and it appears to be trapped nerves causing the pain, which has now completely gone! So i was worrying about nothing.
It sounds like everything so far is going in your favour, don't spoil it by worrying about everything. We have to take every day we are given and make the most of it. There are some great teachers of that Philosophy on this forum.
Perhaps Mr L really needs a different bike seat 😆
take care and have a good day ,