Vent or asking advice

I'm not sure if this is a vent post or asking for advice post.. it all started when my husband and I started to TTC again start of 2018, things were getting more tense because he wanted another child and thinks we are ready.. end of March i realized that my period was late and took a test, came back positive can only get better right? it was all fine until mom-in-law retired and came home(we live in his home country) from there it was all down hill.. my stress levels went sky high and I'm so depressed i dont even want to stay anymore.. it gradually got worse with them always telling me our oldest should still be on the bottle(hep self weaned at 28 months - i breastfed) and he should still be on diapers (again he self weaned last month - he is now 2 years and 8 months) i feel like i have no say in anything anymore and they want to decide everything for me. i will ask my husband a question and he will snap at me for no reason, i am really unhappy since they have been pushing me out of our home and i feel like if it continues like this i will take drastic measures and it will end our marriage... this baby is arriving in 4 months time and we have the basic clothes and bed from our first son but no car seat or any protective gates at the top or bottom of the stairs and everytime i bring it up he starts snapping at me and i am just really unhappy, im not a nagging wife i will ask once a month ask for something but i still do things on my own and its slowly killing my love for my husband... im just at the end of my sanity