I got a cut on my eyeball and it is paining a lot. what should i do??

Depends: Small superficial cuts or scratches in the eyeball heal fast with and eyepatch and topical AB. Large and deep ones may need repair. Go to the Dr.

Corneal abrasion: You should see a physician as soon as possible. It is likely you have suffered a corneal abrasion. You may need antibiotic drops for this condition. You should look up a local ophthalmologist in your area or visit an urgent care center for closer observation and treatment. Good news is that eye injuries typically heal relatively fast.