Social anxiety help!

So I’ve invited my friend over to swim that I haven’t seen in a while. We both have 2 year old sons and they have never met, so I thought this would be fun. She’s coming in two weeks and I honestly feel sick to my stomach. I feel like she’s going to judge me and how I look, I’m not going to be able to make conversation, or shes not going to have fun. Does anybody have any tips? 😭