Party through morning sickness

We throw a derby party each year. We normally own but are currently renting so this year it's a lot more stressful. We have a party tent, tables, chairs and everything and my husband just keeps spending money. I'm so sick I am struggling to help. I've made all the food but everyone is showing up at 3:00 today and the party tent isn't up so we haven't been able to decorate. My husband keeps telling me not to stress out but I'm just watching him spend all this money and keeps running around. I don't know what to do. I want to cry and scream all at the same time