Did you drinking coffee upset your baby while you were breastfeeding? C has been really irritable at the breast lately so at some other bees suggestion I'm going to try cutting out my morning coffee

If your baby was affected by it, was tea ok? Or all caffeine?

I have a feeling it could just be she is in a fussy period in general (7 weeks and a total pill all day yesterday. We both cries before she finally went to sleep). But I wonder how common the coffee issue is.