Its fine, dont worry. Like how your height increases and gets stabilized after 18,similarly your sight will get stabilized ( will not grow)further in majority of cases . But in few people it keeps on increases and gets stabilized after few more years
Continue wearing your glasses constantly...
Next Steps
Get your eyes checked by eye doctor yearly or 6monthly or incase u feel your vision is getting blurred.
Health Tips
once when your eye sight will be stabilized ,then if you do not want to wear spectacles ,you have options of lasik( refractive surgery). when you visit for an eye check up ask your doctor regarding this, they will let you know further details