Great way to start the day. >rant<

I guess I just needed to rant. 
Today I have hit 28 weeks which according to some sites is the beginning of tri 3. Well didn't mine start off with a bang. I have been crying for the past 45 minutes and just can't stop and it all started with my SO leaving for work and me being home alone. Now I just can't stop thinking. I feel like I have completely lost myself since being pregnant. I have hated every second of being pregnant and I feel like such a horrible person. I feel so detached from the world. I used to be so fun and outgoing and now I'm stuck inside a bubble. I'm always so angry and depressed and I can never concentrate on anything. My sense of humor is gone. My love for food. I don't even know what to do anymore ):