Is this normal?

I am 27 weeks pregnant and in the middle of trying to move while my boyfriend and I are starting the process to buy a house. We haven't really talked about anything other than the moving or buying the house. I also have an 11 year old and an 8 year old that is not his. During my first to pregnancies I don't remember ever being this unhappy or sad. I cry alot. I kind of feel like I am losing excitement for this baby. I feel so drained and huge. I am measuring a week ahead of what I should be. I looked like I could be 8 months pregnant. My head is just all over the place. I also feel like I can't talk to anyone about it because my family is very judgmental and so is my bf. I just don't know what to do!!