Is there something you've been wanting to do, just for you?
When I get a bit nutty with the sameness, I try to figure out what it is I'm really needing. Obviously, I can't presume to tell you what you are wanting or needing, but maybe some open-ended free-writing "If I had a million dollars and plenty of time, I would....." and just write, explore what it is that sounds interesting or intellectually stimulating for you, and maybe go further, revealing what you hope to get out of some of those experiences or activities. I know that when my brain isn't engaged beyond the mundane, I get a bit crabby.
I've struggled with this too, from time to time, and don't want to give you any trite answers, because this is sometimes deeper than the "give your house a whole new look" happy-homemaker advice I've found online. Sometimes, a bit of angst can provoke us to look deeper and see where we might carve out a new niche for ourselves or find a new way of growing into the person we want to be. I can't tell you exactly what that will look like for you, but I do empathize.