Fermara didn’t work

Hey all! Just wondering if anyone has had similar experiences. I was on clomid 100 and I started developing cysts. They switched me to fermara this month and I went through the step up twice with no success. My doctor wants to meet with us again to go through a new plan. They have talked about injectable medicine but I’m not sure on any specifics until I meet with my doctor. Has anyone done injectable medicine and if so what was your experience? On what cycle days did you have to get a shot?