Local pain, malaise, chills, rigor are all due to an immune response which is producing neutralising antibodies that in turn produces IgG and IgM and will save your life so I was delighted to suffer
Some patients who are immunosuppressed (ie cancer patients having chemotherapy) do not produce many antibodies and although we are keen to immunise them they may not be fully protected. They do not seem to get many symptoms when vaccinated. BUT in normal people and professional pilots
there seems little relationship so provided you have had a proper vaccine I would not worry. Pfizer and moderna tend to produce more symptoms on second dose regardless of interval. AZ less so and may be the other way round as you can get a response to the adenoviral vector it contains.