My worry about dizzines?

i have been feeling dizzy for sometime now. i think it started somewhere around March when i was preparing for my final exams at the university. Even though it is on and off, i feel very uncomfortable anytime it happens. I visited the doctor and he ruled out anaemia, thyphiod, jaundice and malaria after lab test eventhough i was treated for malaria. Even today, i feel very dizzy. the doctor said it could be a cardiac problem or something to do with my blood pressure which read 130/80. I checked two wks ago and it was 120/80. please help me because the dizziness makes me feel very uncomfortable.