I’m going to have a meltdown

36 weeks pregnant, can’t sleep because I’m up most nights in pain, or in the bathroom. When I’m in bed I get woken up by fiancé grinding his teeth, now my 5 year old son sleeps with us & he’s been coughing in his sleep tonight. He’s been sick with a cold since last Monday (a week ago) and hasn’t been coughing much until tonight. All I want is one night of peaceful sleep. My fiancé just woke up and I was talking to him about it and he said he’s sick of me complaining and I can go sleep on the couch 🙄