Stressed with 1st birthday party!

So stressed to no end 😢 Our little girl will be 1 Thursday!! So we are planning her birthday party this for weekend & my husband decided to invite more people to our "Little" party at our home... Now we have to find a place to rent to fit everyone in it for her party, that was supposed to be small. That's not the only issue, now we have to get a lot more food & possibly a cake that is going to be too small for everyone that has already been ordered & might not be able to change it.. I'm the one doing all the cooking & I'm 22w3d pregnant so it gets a little painful if I'm on my feet too long. Her first birthday wasn't supposed to be so stressful!!! Any advice on how to make it through the next week without going crazy??