The hair cycle normally consists of growing, resting and falling hairs and there is a delicate balance between these stages of hair cycle. Normally hair should re-grow but if it is not happening, you should consider seeing a dermatologist.
Further information is in the following weblink
https://www.aad.org/public/diseases/hair-and-scalp-problems/hair-loss
You can use it.
Next Steps
Your dermatologist will decide a treatment plan for you after a consultation.
Health Tips
You can consult me online for personal recommendations.