This weekend I was doing a deeper dive at about 100 feet. I was perfectly fine one second and then the next second I was in a panic. I had a weird pain on the right side of the chest and then this urgent need to surface. I was breathing really hard and freaking out. I was able to get my emotions in check and surface normally with a saftey stop but I litterally thought I was dying for a short time. I remember telling myself I have to make it for my kids. SCARY that I had to go there.
I am not sure what brought this on but I am a fairly experienced diver and have not had anything like this happen before. I keep replaying the dive in my head but cant figure it out. I was diving a 130 steel tank for the first time deep but I was weighted properly and didnt have any issues that made the dive uncomfortable. After surfacing I was fine and after a 30 min surface interval, I geared up and went for a second, shallower dive with out any further issues.
Though I am not a huge fan of going real deep, I had no anxety about the dive prior and have dove to 120ft numerous times in the past with out issue or anxiety. Not sure what happened that day but it was like a switch flipped and I almost lost it. I literally an grateful I had a full face mask on cause I felt like I woulda spit the reg out and freaked.
Talk about spooky!
This is purely a nonmedical opinion but I vote for a good, old fashioned panic attack. You've "never had one" until you have the first one and rarely can a specific trigger be identified. I think you've had your first one.