Pupils different sizes at all times

Has anyone else experienced this and does it ever go away?

I'm a poly substance addict, mainly benzos and DXM but I also use codeine, zolpidem or anything else I can get my hands on. Anything that gets me fucked up with a preference for benzos or dissociatives/opioids. Currently I'm using DXM regularly (every few days, sometimes multiple days in a row) and was using benzos daily but I've been sober for a few days due to running out, not by choice. My pupils have been different sizes for a while now, I don't know exactly how long but a while. Even when I'm sober they stay different sizes. They'll still dilate like normal when I'm high and usually go back to normal size after a while of being sober but they remain different sizes even when dilated or back to normal.

I've seen that can be a sign of brain damage and also seen that DXM abuse can cause brain damage. But I've also seen that pupils being different sizes can be due to drugs too so I'm wondering if it's just the fact that I've been using so many drugs at such high doses or if I could've caused myself some kind of brain damage. And if it's worth seeing a doctor for? Currently in the process of getting some help from a seperate service for addiction but I've not spoken to my GP about my drug use before so I'm not exactly wanting to go but also wondering if this is worrying enough to need to be seen for.