What is this?

I’m not sure if this is pregnancy related or what, I’m going to my family doctor in the morning when they open. But this rash appeared on Friday, i didn’t think anything of it. But now it seems to be spreading and it’s not like it bothers me. It might itch once a day.. if that. It’s located on the side of my knee. No where else, has anyone ever seen this kinda rash during pregnancy? One thing i have noticed is my feet have been swelling ungodly amounts. I prop them up, drink lots of water. But it’s to the point where leggings are making indentions on my legs. I told my dr about that, she just said to rest more and use pillows to prop them. Hmm..