Gender reveal spoiled !!!!!

My sister in law said she wanted to do the gender reveal. So why not, for some reason I had a small gut feeling to say no. Didn’t pay attention to it. So the party will take place at my house and I cleaned already and all there is to do is decorate. I’m also helping with food, I’m making a chicken potato salad. I had to go get the rest of the ingredients and left. Came back home because they were kinda irritated. All they had to do is bring the tables and chairs. Went over since they literally 50 feet away from and her man gave me attitude. I left next door to my mother in laws house and he came complaining about for tomorrow. I told him don’t worry we’ll all help. We don’t got much, so kept complaining and said we’ll see if you actually come help. Told him if it’s a problem don’t do it. He said ok yeah we can do that. He message my sister in law and said I was talking shit she came in like ok who’s talking shit. I told her I’m not talking shit but he’s said that and all that. She got heated and was like ok whatever I’m not doing this for anyone not even you but for my nephew! Like wtf...

I started to cry and said exactly I left and was so upset like who does that anyways im still holding in my tears because I honestly they did me so wrong. Now I’m not sure how I’m going to feel for tomorrow since my hormones have the best of me. The gender reveal is tomorrow and our families are coming and ugh it’s just so stressful and so upsetting. 😢😢