I used to whitewater kayak and loved it. One summer I went to a whitewater camp on the Ottawa River (which has HUGE waves) where they teach a paddler to improve in big water via "immersion therapy." It didn't work for me. Although I paddled stuff that I could never have imagined, and did it successfully for the most part, I got stuck in a recirculating hole where I was repeatedly immersed by the water...like being stuck in a washing machine. It created new anxieties that I never could overcome, so then paddling on my easier class 2-3 rivers locally became too emotionally exhausting. I lost the ability to roll my boat back over. I haven't been in whitewater since. And BTW, I do take meds for depression and anxiety. This type of "therapy" is indeed a BAD IDEA for someone like me.
I'm not sure it's just you though. I know a couple of GUYS who literally quit WW kayaking after ONE bad immersion (in this context, the immersion was literal). Except they weren't doing the immersion on purpose. It were just part of WW progression (they thought), that one day, they got stuck in a bad situation.
The thought that one might
die of drowning is a pretty powerful experience, which can easily create anxiety in just about ANYONE whether they have history of anxiety or not.
I also pretty quit WW after a string of bad experience. I was in a trip where the water level was much LOWER than expected. So there were significantly more exposed rocks, yet the river was still flowing quite fast and quite powerful. Several paddlers in the group flipped, got knocked about quite badly. It didn't help that I failed my roll on a trip the previous weekend, and was already low in confidence. So when it's my turn came (flipped), I failed my roll also. I got tossed around and knocked about for what seemed like HALF AN HOUR! (when in reality it was probably a couple minutes). Although I was unhurt (and got my roll back in the pool) I had not been back to WW. This was 2 or maybe 3 years ago.
I had long ago been warned, and had decided I would not go to Class IV. Recirculating hole being one of those potential I decided not to deal with. But as this was happening in a class III, I have yet to come to terms with it.
I suppose in my case, it isn't so much creating a new anxiety. But rather I was just presented a reality that I had not prepared for. I really don't like the consequence which IS the reality! However, missing paddling in foamy water, I'm still torn about returning to it.
I have the same dilemma when it comes to skiing glades. On the one side is the powder. The others, unyielding trees.