who knows about cats in labor?

Erica • Official inspector gadget of glow, mommy of 3. 9-18-12 💙4-20-15 ❤ due 9-30-18💙

My cat mesha is pregnant, very pregnant. I think she may be going into labor. She came inside and starting acting very lovely (unusual) then started viciously attacking the dog and other cats for no reason at all, just ran up and started attacking them, she keeps going inside the pet carrier laying on her side, popping her butt up and howeling... anyone know if this sounds like shes about to give birth?