28, blood pressure 142/78 should i freak out? headaches in temples and on and off dizziness.

Don't freak out: It's not very likely that temporal headaches and dizziness are related to a blood pressure of 142/78. A checkup with your doctor would be a good way to determine what's causing your symptoms. Your systolic blood pressure may very well drop with salt restriction, weight control (if needed) and exercise. But I doubt that your symptoms are related to the minimally elevated systolic blood pressure.