Is she getting too big for a 2L pot?

Hi there! 2l pot is for sure too small for any cannabis unless you are trying to grow small. I'm not an expert on transplanting but still I'd say that transfer to ATLEAST 10l but preferably to 15l pot ASAP to get the most out of her. There might be somekind of shock when transplanting so try not to hurt the roots when doing it. Best way to do it is to water the soil thoroughly and then pick the whole soil blop and move it to new pot and fill with new soil. Next time you should move it earlier or even better with autos is to plant straight to final pot. Basic rule of growing plants is: Bigger pot = Bigger plant. When the plant fills the root zone of the pot it does not grow so much anymore, but when given enough room they will grow BIG.