I know how you feel, my sanity score constantly goes up too. (Though it's not as high as yours...)
I'm currently at 136, which was pretty surprising to me...
If any of your results worry you, I suggest you speak with a doctor (if you haven't already)
I did and well...let's just say I'm quite thankful I did. I'm being prescribed for medication.
If you ever need someone to talk to, everyone here at Pc would be more than happy to chat

Also, remember that the sanity quiz isn't 100% accurate, so stay positive and do what you need to do!

Hope things improve for you

-insomniac