I have daily mild headaches, lightheadedness, eye pressure, sometimes mild nausea, sensitivity to sunlight that worsen my symptoms since over a year?

Headache syndrome: Your symptoms are at least suggestive of chronic daily headaches. Although this is not a specific diagnosis it does indicate that if your headaches are not due to some obvious secondary cause then, you will need a form of preventative medication or intervention. My advice is to begin a headache diary and seek out a good specialist. Don't overuse/abuse over-the-counter medications.