Bed placement

My room is square, unsure which placement would be better my kua number should be 9, 4 walls consists of se, sw, nw, ne.
But my sw walls have windows along the wall, bedroom door is ne. So I left se and nw walls, if placing bed head against the wall on se the door would be on my right align with the bedhead which is deemed as bad in feng shui?

And if the headboard is against the nw wall its actually a toilet behind the walls, where would be the best position to place the headboard against which wall?

Thank you in advance