If you are a medical student then your school should have a department of ophthalmology. Schedule a complete eye exam there. You are talking about 2 different symptoms: 1 the way your eyes feel and 2. the way your eyes see. Likely different causes. Excess screen time, iphones, computers, TV, video games are contributing to an epidemic of myopia and dry eyes worldside. You could have a refractive error like myopia or hyperopia or astigmatism, you could have an eye muscle problem like convergence insufficiency and/or dry eyes.