Feel guilty that I can't understand what she's saying

I sometimes feel so guilty when it's clear charlotte is trying to tell me something but I just can't understand her as it's babble. She stands there repeating it over & over & looks lost when I obviously don't get it. I always try to respond, but it's usually "yeah, really!".



She says many many individual words but no sentences, I try so hard to figure out what she's telling me & feel so guilty coz she looks so hurt when I don't get it.



She's nearly 21 months.