Not excited for baby shower

So I didn't want a baby shower because I end up stressing and of course it's never a surprise. I always buy things and pay for things for the shower. Maybe not everything but for a lot of it or most expensive. This time my sister really wanted me to have a shower so I said ok. I am constantly hearing how much she spent and how much she has to do. But she is only doing games and prizes. My mom also is always letting me know how much she is spending on the food because that's what she wanted to help with. My cousins are helping with decorations and they have been great. Not one time have they complained. Then I am stuck with bringing cupcakes, fruit, pizza, tables, chairs, table covers, plates, cups and a jumper!!! Why a jumper? Because it's a family shower and there will be kids.  I am trying to be as calm as I can but I my husband knows me and knows I am not happy. But shower is tomorrow and no way to back out. I should have stepped my foot down and said NO!!I don't want a shower and that's it!!!! But I didn't. So my fault.  Don't get me wrong I am grateful that they wanted to do this but shouldn't they have done it all!?  Sorry rant over. Just had to vent.