Does anyone know if there is any point to taking Femara without Ovidrel?

In spite of my PCOS, I was having regular cycles up until my miscarriage last November... but I haven't ovulated since then. I'm not sure if it's because of stress or the fact that I work midnights now.... probably both. But my specialist prescribed me Femara and Ovidrel.

My insurance doesn't cover the Ovidrel, but I went ahead and purchased it anyway, hoping at the very least that one round might trick my body into regulating itself again. But if my screwy sleep schedule still keeps me from ovulating, do I have to buy the Ovidrel every month? Or can the Femara be effective on it's own?

I just don't have the money to spend *every* month. Anyone know?