Feeling less and less pregnant every day

I have an ultrasound tomorrow and honestly don't even want to go....I also think don't even feel pregnant anymore. I had on and off nausea for a while and I don't get that anymore. I just feel depressed and tired...I don't want to go to work I just want to stay home and sleep and cry. Idk why I'm feeling so dramatic. But for some reason it feels Like the baby isn't even there anymore even though I know it is