Cravings...?

All I want to eat is spinach and leafy greens. Nothing else sounds good and all I think about is spinach at every meal or snack of the day. This is new as of last week and I’ve been eating it every day.. I don’t particularly like it but I absolutely have to have it, the craving is so strong. Has anyone else had this? I’m not pregnant I don’t think and this has never happened with any food before.

Note: I’ve been ttc for 8 months now and I am a 20 year old female with no health issues