Why am I SO exhausted??

I literally can't even get up off the couch and walk around the house without feeling exhausted and wanting to lay down again. I'm 34 weeks and I've never been this tired before. It just kinda hit me today and yesterday too. Like yeah I've been tired the whole pregnancy but not like this! Literall NO energy worse than the first trimester. I have stuff to do and I'm just too tired to focus on anything. Help me😭