Norwood scale in doubt about it male pattern baldness

[Dior76]

I'm in doubt about the norwood scale. Where am I??. I see Myself at norwood 4/5 as I have line far back at My scalp at vertex region.
It's not Possible to see the line on the picture.

It is necessary to visit a dermatologist or hair specialist to find out where i am on the norwood scale?. Or could i do it myself?.

 

[OldnBald]

Bald as f***. Stop wearing a flipsy do.

 

[jazz1]

I would say 4, you using any Hairloss medications?