I agree with your concerns. This increased salt ingestion will probably make your blood pressure worse. Instead of trying an empiric treatment, I advise you to go to a provider who can perform a history and physical examination and then figure out the cause of low sodium, because the complex thing is that low sodium can be seen in dehydration
but also in conditions when you have too much water in your body.
Dr Brenes-Salazar MD
Mayo Clinic MN