Hello,
As a surgeon, I wanted to give you information like, you have mentioned you are having diffused thinning of hair, which is also referred to as Telogen Effluvium. In this condition, your hairs which are in telogen phase (resting phase) due to sudden shock those hairs start shedding off.
This condition is tempory and is a reversal.
Finasteride is a USA FDA approved medication and which helps in giving good results related to hair loss.
You can take this medication but with dermatologist concern and this should be taken for a longer duration to see good results.
Keep taking this medication, finasteride and minoxidil both work well if taken together.
treatments like PRP, derma roller, micro needling, laser helmet etc are good hair treatments, which can help in controlling hair loss.
I would suggest you to use both together to experience better results.
I hope I have shared my experience to make you understand about hair loss and its treatments.
Do let me know if you wanted more information.