Be at a level you are comfortable with until you are ready to go further
stay at the same level for a while and just get used to it
Maybe try ridding a more "push over horse" when my ottb was super hot and I got scared my trainer had me jump a "push over pony" and it helped a lot. That's what helped me maybe it will help u to or something else will work better!
How I got a lot of my confidence was by jumping a sweet beginner horse and mostly did crosspoles and that helped me a lot because I could focus on me and I knew I was safe