Help with some head shed?

[Edea_Tsuki]

Hi again. Lot of time that I don't write here. I think I have a big problem...
Before we start maybe it's better to explain what appened one weeks ago, because I think it's related...
Unfortunately after lot of time that all goes right, I made a little mistake and my BP bite me for the first time. Essentially he was in shed and I didn't notice it, because usually I check his eyes that went grey for the shed, but this time I simply think he passed this fase before I notice it, so I take him for clean the terrarium and do maintenance. And here the bite. I specify that he probably think that I was food, because he remained attached for a bit.
I think this experience was extreamely stressful for him (damn, I learn that I have to do more attention to these things) and late days later, I found his shed all in pieces, with many attached to him yet.
I shed off him with warm water, but today I notice that he have this sparkly scales in the head. I think that there are some pieces of shed... He really hates to being touched in head, for shed off his neck I really had a bad time...
So I want to ask you guys if it's a big problem that he have them yet, maybe they shed off with next shed? Or there are a huge problem? Unfortunately I live in a island, and here we have only ONE exotic veterinarian, and she really doesn't know so much about reptiles because she is specialized in all "Exotic animals". Yeah I know, a bit general... But there is only her here. She entrust to a breeder for reptiles.
All this talk for tell you guys that if this is a serious problem, probably I have to do myself or pay the breeder for do that. But I have a huge fear that my BP get stressed out again... So I ask you whats is better to do, because you guys have more experience than me.
I post here a photo about the sparkle scales. (his scar in the snout is stuff that he had when the old owner give the BP to me. I don't really know the mechanics about this but you guys help me with that!)
A note: Sorry for my probably bad english. I'm not native, but I can repeat myself if something doesn't clear. Long story short, I am here because in my country simply nobody that owner a snake helps you with anything related to them. They are really too egocentric and rude to help someone. It's... really sad. But let's focus on the snake...
https://im.ge/i/11yfZp