When your leaving the room or going out anywhere, don't say anything to her, touch her or even look at her, yes I know its hard Practice leaving the room for 5 mins at a time through the day, gradually build up the time according to her progress You can then start to put your coat on, and leave the room, then pop back in a minute later then prolong the time, till your actually going to leave the house, when you do leave the house, hang around for a bit and see if you can hear any noise, each time you leave prolong the time. When you return, don't make a fuss of her (yeah another hard thing to do) don't go straight to her, pop the kettle on and maybe go to another room, for a couple of mins before going to her!
I tried this with Max ( had him when he was 9mths ) and it worked well.
Mind you he has many 'time-outs' in the kitchen by himself for being naughty
and i don't hear a sound out of him
Did a similar thing with my 2 girls as pups too!
She will never stop following you around completely, but will soon get used to being on her own so don't worry too much.
I still can't go from one room to another without 3 apparantely 'sleeping' cockers jumping up and following me.
Tia,19mths, is the only one who will fuss if i shut them in the living room, she does a 'raptor' impression and snorts under the door
and cries.
But a simple 'quiet' shuts her up
Have you tried putting her in a room on her own for a few minutes yet to see how she reacts?