Considering your issue, I think the refractive index maybe not correct. If you wear the glasses of high degree, it will certainly make myopia more serious, as well as low degree, which can also affect your eyesight.
Have you had your glasses in the professional hospital? Sometimes, if the quality of the lenses is not up to standard, it will certainly bring damage to your eyes. Wearing substandard glasses can accelerate the development of myopia.