I'm 36 weeks today, my pets are acting weird?!

I'm 36 weeks today , I have 3 pit bulls 1 male harvy who's 1 year and a few months, I have a female mrs Quinzel who's just turned 1 and hit her first heat at the sametime, and then I have a 9 month old ivy, my harvy is crying alot and always trying to lay with me and cuddle and trying to get as close as he can to me and lays his head on my belly , he's crying at me and mrs Quinzel but not humping her or anything n that's good . Mrs Quinzel is being mean to him by barking and showing her teeth but hasn't done anything to hurt him just showing he needs to stop ,she's also clingy to me but we don't let her on the couch till after her heat is done but she's always at my feel or when she gets loves lays her head on my belly too. Ivy is acting weird with Mrs Quinzel being in heat she's none stop play and goes crazy and I have to get on her to stop and chill out, she's also gets on the couch with me and put her head on my belly or rubs her head or body on me and I can't really stand it bec she pushes hard and I have to push her off me, so I feel bad , she also sits by the door and crys sometimes even when I take her outside thinking she has to potty and she dont. I'm not sure what else to try to explain but I feel like they are getting on my nerves with telling them to stop or chill or get down ect. Has anyone experience how their pets are acting? Is this something I need to worry about when baby's here, Or something with labor coming along?