I figured I’d post an update…the anxious reappraisal definitely helped, thank you for introducing me to that concept! And the feedback from this thread made me realize the similarities between this and how I have felt professionally: striving to reach a goal, reaching the goal, and then going “Oh crap! What have I done?! I can’t do this!!” I’ve learned to cope with it pretty well professionally (fake it 'til you make it, no?) and am now comfortable and happy in my job. And successful. I actually typed “comfortable, happy, and successful” but deleted “successful”, then realized that is a symptom of my problem! It is bizarrely difficult to acknowledge that I’m good at what I do. Seeing the parallels there has really helped me.
But wait, there’s more! I started this thread after a lesson that was “fine”. Nothing bad happened, and we ended on a really good note. But there were some ‘meh’ jumps in there, and my horse was having a bit of a sluggish day - he can and will fall behind my leg if I let him, and in that lesson I really had to get after him while warming up. Not coincidentally I’m sure, in my next lesson, my trainer had me really sharpen him up to my leg and demand a “Yes, ma’am!” instead of a “Sure, ok”. We routinely lengthen and shorten the canter while warming up, but my trainer got after me to get him to really respond when I asked him to lengthen. And ya know what? With THAT canter, I felt like I could jump the moon. Had a good lesson this weekend - my head was screwed on straighter, and our canter was definitely better, which improved my confidence, which improved our ride :D. My horse was jumping super, and my trainer commented that he was using his back really well (thank you, better canter with more engagement and impulsion). The only downside is I did have a hard time staying with him over a couple oxers that we got longish distances to that he jumped big - I have a tendency to drop back early and land in my seat instead of my stirrups and that was exacerbated over the bigger efforts. There’s my homework for next week!
So anyway, my lessons learned are it’s not about the jumps, and if I have a drop in confidence, check the quality of the canter!