Hello, I Got Up Out Of My Bed, Went To

Hello,

I got up out of my bed, went to the bathroom this am (as Usual) sat down and as I sat down, I sorta "tipped" like my equilibrium was off and almost hit the glass shower door next to the toilet.
This afternoon, went to the bathroom again, and as I sat down (different bathroom) it was almost as though the toilet seat was tipped because it happened again?? Same side right. but had no issue sitting on the couch or in the car. . . Any ideas?? Thanks