my 6 month old female has started barking at me when she wants my attention. I'm not allowing it. . she barks at my bedroom door whenever I'm in there. she barks at my back when I'm using my laptop. today ive put her in the bathroom 3 times when shes been barking she's in there now whining. am I doing the right thing?

Dogs are pack animals. You've taken her into your house as a companion and now you're shutting her away. She doesn't understand. All she wants is to be by your side - why aren't you letting her? .

I am with her most of the day. I take her for lots of walks. I play with her. we play tug. I throw ball for her. my husband is usually around when I'm in a different room.. I'm not shutting her away.

OP you can't have her barking at you even when it's just because your back is turned. and you are not focussed on her.
I would try totally ignoring until the barking stops. But make a fuss of her when she is not barking. If this doesn't work, rather than put her in another room - which is still giving her attention of a sort - why not try leaving the room/house yourself without even making eye contact. It's a pain I know but hopefully she will eventually learn that barking means less attention not more.
The other thing you could try is set routines for playing. For example my girl brings me her ball to play with after her main meal and at other distinct times. And she knows that the time between the last walk and bedtime is when I get on the floor for a tussle! Not sure how we got into this but it works