31 weeks pregnant and amusement park?

So I’m 31 weeks pregnant and I’m starting to get aggravated at how everyone (including my husband) seems to think I can just go and do whatever I want. This heat is already kicking my butt! I hate to be like that but our friends mentioned us going to a amusement park and my husband is like yeah, yeah and gets all excited. While I’m over here thinking heck no! It just bothers me cause I feel like he just thinks I can do whatever. I’m already swelling like crazy. I can’t ride on the rides so why would I want to go and be miserable? Sorry I honestly just had to vent cause I’m starting to get annoyed. This isn’t the first time it’s happened. And our friends just look at me like I’m crazy for saying no. Am I overreacting by being upset?