Cravings?

I’m currently around 4 weeks 2 days and I’ve been having cravings for 3 days now, it’s always the same thing

Cucumber salad (I’m allergic to lettuce so I substitute a bed of cucumbers) i typically don’t even like “salads” I’m more of a sandwich or taco girlie. I have to have it the same way or I just won’t eat at all and it’s about the only thing I’m eating (good thing it’s healthy I recon) has anyone else had cravings this early?? I woke up at 6am wanting my salad