Its not at all big numbers.... Have u been examined by putting Eye drops which blurs ur near vision? If not go for that. And that migrain might be the real reason for that.... migraine caused by fluctuations of blood flow in brain...
Next Steps
Go for cycloplegic refraction. Convergence deficiency check up. to nearby ophthalmologist.
Health Tips
1. start pensil push-up. https://youtu.be/mGLURhRy3xk
2. start some cardio exercise, pranayam, suryanamaskar.