Letrozole, progesterone, steroids, and trigger shot... What??

Katia

So can someone explain this process for me? Especially the trigger shot. I have high testosterone so I'm getting a steroid shot for that, letrozole for obvious reasons, progesterone because that's why I miscarried the last few times, and trigger shot? I was not told about some trigger shot? I thought letrozole makes you ovulate?