Third trimester hormone change?

Kyle
I feel like my hormones are going out of control. Almost as bad as in the first trimester. I can't stop crying, I feel so overwhelmed, and I'm fine. 33 weeks and perfectly healthy. We're fine, my baby is fine and healthy. I don't know why I'm so stressed and freaking out. Are there hormonal changes that come on late in pregnancy to get you ready for birth that are doing this to me?
Please tell me if I'm normal. I'll feel better if even one other person also says she feels teary all the time.