Anyone else constantly starving?

Kirsten • 3rd babe coming March 2022
I just hit 19 weeks and I went from not really ever having an appetite, to I cannot get enough food. I have been trying to eat a lot of protein because I cannot stay full! I am scared I am going to start gaining weight too fast (I have only gained about 5 so far). Does anyone else have this issue? How do you stay full?! Haha