Diziness n headache in upper right side.

I've been feeling dizzy since last 1 month and also mild headache in upper right area. I've read somewhere on internet and it showed brain tumor and blood cancer etc. I have also got heartburn sometimes after eating and throat heaviness which i guess is due to anxiety and eyen sometimes pain behind my right eyeball. I've also been diagnosed with cataract in right eye 2-3 months ago which is directly in front of the eye due to which I am getting blurred and hazy and cloudy vision. Also in my left eye i guess my glasses are not working properly now because the letters appear to be blurred. Can these be reasons for dizziness and lightheadedness? I am very much worried about it and unable to prepare for my upsc mains examination too. Kindly help me please.