I recently have been experiencing strange health issues, had 2 blood potassium levels that were high. Now 5.0 but low sodium 133. Been felling unwell?

HIgh potassium level. You lab results are a bit abnormal. It would be helpful is you could get the results of the bun, creatinine and carbon dioxide levels, as well. Ask the doctor who ordered the blood tests for you for his explanation of your lab work. He is the best position to answer your questions.