This is kind of an example of why relying on personal experience and anecdotes is so bad. OP took intelligent countermeasures to avoid a negative outcome which was unfortunately ineffectual due to mischance.

Despite the theory making no sense OP assigned the consequences of covid to the vaccination he received not due to a sound theory but due to proximity in time and will now make measurably worse choices for decades for lack of communicating with a medical professional.

We rarely know what we don't know.