Hey there,
Psoas impingement syndrome - I don't know if this what I have now , but I definitely had it before surgery on both hips. Now I have pain in the front of my hip with hip flexion and sometimes a little burning if I overdo it, but none of that pop with the stabbing pain. I assumed it was my quad tendon that was forcibly yanked to one side during surgery, but there's no way to tell for sure. Anyway, it is improving.
I started running track and cross country when I was 8 in So Cal because that was the only sport available for girls at that time. I got my first pair of orthotics when I was 12 (they were leather!), so I have a lot of experience with them. It definitely can be a chore to find shoes that they fit in. My best luck is with running shoes. Do you take the factory insoles out of the shoes when you put the orthotics in? Also, if your orthotics have a floppy neoprene like piece under the toes, that can be trimmed to fit the shoe you like. I just did that with mine.