How would you even know it’s internal only without testing? No doctor worth their salt would tell you that without tests. You should really see an allergist to cover the basics.

Allergen blood tests aren’t very great. The skin prick test by an allergist is the gold standard.

whatever it is you’re trying to do, be careful that your pi-hole DNS on port 53 is not exposed to the internet. otherwise your server will be abused for DDOS amplification attacks.

have you tried updating?