I Have Been Experiencing Pressure In My Head And Higher

i have been experiencing pressure in my head and higher elevated blood pressure. The pressure in my head comes and go's but it has been happening now for about 4 weeks. My heart Doctor told me that it is due to stress and anxiety. I'm able to lift weights well still and do a strong 53 minutes of cardio 3 days a week. When im doing cardio i feel much much better. Im growing very concerned that the pressure feeling and light headed feeling dizziness has not gone away yet.