About 6 months ago I purchased a Soviet GP-5 gas mask at Tankfest from a huge militaria stall.. I asked the man who I bought it from it the filters were ok to breathe through, and he said yes. So I breathed through it a few times and I realised that I couldn't take a full breath. I thought it would only be temporary so I ignored it. When I got home I read up about the gas mask and I saw some gas masks contained asbestos, and therefore I thought this was the cause for my breathing problems.
My symptoms are that I get out of breath easier, I feel like I can't take a full breath and my chest feels tight. If you want to ask any questions please do. I'm 15 years of age (14 when I used the gas mask).