I have been experiencing high blood pressure episodes, tachycardia, high blood pressure,headache, diarrhea mild fever. Different meds have been prescribed but i still feel like there is something else wrong. I have had this headache for about a week and a half, tachycardia every other day for 5 days. I felt like i was voming down with a cold or something on march 25th,2017. From the 20th of march to 24th i jad a mild headache that never really went away. Then i started having the tachycardia on the 1st of april.