Apparently pain is a great teacher. I hope it is, because lately all I feel is pain (emotional and physical?).

My leg feels like a throbbing mass of pain basically everyday. I HATE IT.
I had an amazing spring and early summer, it felt great! Things were falling into place (I won a small half marathon! Oats and I made our 2’6” debut and it was fantastic!) and was really in this ‘challenge me’ type of mentality that I was getting a lot out of and feeling strong and confident!
Now, it feels like everything that I worked hard for kind of went off the tracks. Oats went suddenly lame before a big horse show I was really looking forward to, and we had to pull out. That same week I tripped running home over a small hose leading to a construction site and face-planted quite dramatically on the pavement. I was ok with no serious injuries, but it scared me, was painful, and took a week or so to heal.

The last show that went well. I see a lot of things to fix, but I remember having a really fun time and smiling. How do I capture that joy again?
At the same time I tripped and fell, I unknowingly had developed an overuse injury in my leg and couldn’t run at all. I have now been off for a month, and while I am getting treatment for it, it is a slow process and can expect to be injured for another month at least. I am (or was..) in the middle of training for a fall marathon and now I feel like giving up.
Oats came sound after a few weeks- longer than I thought he would be off, which was anxiety inducing to say the least- (after I healed from my fall) and things just haven’t been very smooth. I feel frustrated and things just don’t feel happy and easy, like they were before everything happened. Our rides are full of tension and while I am taking lessons regularly, we have good moments but on the whole it feels rough, awkward and makes me feel unhappy.
This came to a head this weekend when I had him at a small, no-stress schooling show and he felt AWFUL. Tense, unhappy, distracted and very anxious. We were at the same show a month ago and it was night and day! I have such happy memories of how thrilled I was at the show and I was saying I loved riding him so much I wanted to canter forever, it felt so amazing!! We were actually worried he had an episode of gas colic, he was so out of sorts and acting strangely. Not like Oats at all!
I can’t really ascribe all of his behaviour to me and what I am feeling (mostly frustrated and in pain) he could just be having an off day too, but he does mirror me closely sometimes. Too closely.
I am taking a step back this week and having my friend and competent rider take over my jump lesson so I can watch. All I feel like doing these days is griping and crying about what I can’t do?! I feel like I can’t trust myself or my body to do or know the right things anymore.
When is the next step the right move? Where do I go from here?