Pregnancy & dogs

Do dogs know your pregnant?? I’ve had my dog for 8 year and she is my whole 🌎!!! I’m currently 8 months pregnant with my first child. I’ve noticed she’s pooping in the house and not listening anymore . Could she be acting out because of my pregnancy, it’s been going on for two weeks now . She’s extremely emotional and has been watching my every move. I’ve always felt like she had separation anxiety, but now it’s gotten so bad that she cry’s outside my restroom door something she never use to do .