Talk to Eye Specialist on Eye Sight

Respected Sir my eyesight is -2.00 for both eyes since 6 months . Now a days with glasses when i look to nearer objects i feel pain in eyes and headache. When i remove glasses and then again look to nearer objects then i feel relaxed. Similarly with my these glassses of -2.00 ( eye-sight ) now i can view very very distant objects normal but only distant objects not nearer i feel that my glasses number is greater now than eyesight and i again begin to feel headache and pain in eyes with these glasses for even distant objects but very very distant objects can be viewed normaly with these glasses. So kindly suggest me that what should i do now. Please. Thanks