The pink walls for the bedroom just might work because of the love factor that bedrooms represent. BUT I'd stay away from making the pink too fem/girlie (as if that is possible with pink *LOL*)...my reasons for suggesting that is because you don't want to make your male partner or potential male partner squeamish with that color. Technically what part of the Bagua does the house fall into? You might want to colorize the room according to that part of the bagua and accessorize with love objects where you CAN incorporate the pinks, etc.
As far as your bathroom: It WOULD be considered part of your bedroom if when you close the door to your bedroom, the bathroom is enclosed in that room as well. I usually suggest decorating bathrooms with light greens....and the presence of plants!!!