I had a panic attack in the woods and am convinced I'm dying

I walked out of work because I had a breakdown and couldn't do it anymore. I drove to a park and wandered the trails trying to figure out life. I saw a little desire trail in the woods so I followed it. I think it was part of the actual trail long ago but it grew over. Anyways I came upon a clearing and when i looked left saw a tarp laid out and it looked like a homeless camp. I got closer and saw lumped fabric and I felt uneasy. I thought about going down the trail more but decided to not because I was not feeling like I should. On my way out I found a dollar on the ground. I inspected it and it had mold spots on it and i saw some brown granules stuck to it. I put it in myy pocket. Furthur down the main trail on my way back I began freaking out and was like what if I touched some fentanyl or something else and it's on my skin and I'll die. My heart began racing and my breathing got weird. That stopped when I got to my car. Somehow I convinced myself that I'm going to die in a few hours when it enters my bloodstream.

The logical part of my brain is going Dan stop it youve overdosed before this isn't how it works stop panicking. It was probably just dried mud on the dollar in granules.

Then part of my brain was going you moron you fell for a trap now someone is gonna snatch you so I kept looking behind me down the trail thinking that some homeless guy was coming for me.

I took a photo of the clearing before I went to the desire trail in case I died and someone needed evidence of where I was.