IBS and staying the night places :/

Is it considered a mood swing if I told my partner about something earlier today then later that same day he starts freaking out saying no we’re doing this blah blah blah. I mean since you don’t know I’ll explain.

His dad is getting married here in a few short weeks. I told him earlier we had to get a hotel room for the event. Later on that same day I sent him the link to the hotel and told him we should reserve now it might be cheaper or full by the day of. He said no fuck that we’re staying at his house with a house full of people. Ummm there’s only one bathroom. I have IBS. A house full of approximately 10-12 people, and I have IBS. Like what am I supposed to do? I don’t have a job, I’m a stay at home mom. So my baby will need to sleep and he’s saying everyone will need to shut the fuck up. Like does he realize it’s not our house? He says since he’s his dads best man he should be staying at the man’s house. Idk what to do. I’m not going to be spending the night at anyone’s house that don’t have a bathroom like that. Porta potty down by the beach I just can’t do it. I’ll have to arrive the day of. I can’t put myself in that situation, ain’t right.