Constant mild headach and diziness.

I had constant sneezing for 2 days after which it stopped and I started having mild headache on my right side of head. Also I have been diagnosed with a small cataract in front line of my vision in right eye. My headache is constantly present along with dizziness and slowness and even the eye sometimes pains. The pressure in my left eye was found to be 23 mmHg during the diagnosis. I am very much tensed about this because I was already very stressed due to my upsc exams. I read on Internet and it showed me brain tumor directly but i dont have nausea or vomiting just constant headache in upper and front side, slowness and dizziness. Can it be due to stress or vision problem due to cataract or using laptop n mobile a lot in the past to study for prelims or because i am not wearing my spectacles in which I have power of 1.5 along with axis shift. Do i need to worry about it or its normal? Kindly help me I am very tensed and I have my upsc mains now for which I've to prepare well. Help pls