Very sad to see, buddy. A touch up will be inevitable in my opinion. Asmed will most certainly offer you a free touch up, but you might just be better off with someone like Konior. It might be expensive, but it's likely that then you won't have to worry ever again about your frontal third. Anyway, lets hope for the best for the coming 5 months and some improvements that leave you with a better situation. Personally i haven't seen any new growth for months, so i doubt that we will be blessed with new hairs popping through this late in the game.
I didn't have a HT yet, so take whatever I say with grain of salt.
Diffuse hair loss is obviously bad, but tbh it is also what most people are destined to have as NW5 or NW6 sooner or later. Rarely seen a person who stopped losing hair at NW3 for example.
There is plenty of good results posted here and around the web. H&W for example are good in this, doing up t 8K surgeries IIRC although that is rare. Many FUE surgeries are done with decent to very good results, like with Asmed etc
You need to do your search and be comfortable with you are going with, also you need to decide your goals.
For example, some consider HT about hairline, so many clinics in Turkey will give you perfect hairline, temple area but weak coverage in the rest. Hattingen on other hand usually do a conservative hairline in comparison but stronger overall coverage, So that is up to you to decide.