Hello, Leon22, and a belated Welcome.

Considering your symptoms and family history, getting screened for depression and having a full medical check would be valuable (various diseases have symptoms similar to those found in depression, or they can accompany or "hide behind" depression).

From what I've read, once an individual experiences a depressive episode, they become more susceptible to recurrences of similar episodes. That's not a guarantee of recurrence, just a greater chance depression may return.

You are right to post and increase your watch on yourself.

As for your work, do you see a chance for increasing your grasp of your present role and gaining greater confidence in your own performance?