my sbt is 5 years old and had a litter 2 years ago the last week she started acting a bit strange and whining alot this morning when i came downstairs she had a penguin teddy and is mothering it if my son who is almost 3 takes it away she will walk round looking lost and come and take it off him she will then jump back onto the chair and lick it and cuddle it my son keeps taking it away (i have tried stopping him) and she has growled a couple of times she has never done this before not even when she had her pups im just a bit confused why she has started this now any advice appreciated

has she recently had a season?

Was she in season 11 weeks ago?  If so classic phantom pregnancy.

she had a season december/january i have to say it never crossed my mind it was a phantom but she has been digging at her chair for the past couple of days and has been off her food for about 2 weeks only nibbling at things wich is unlike her i am contacting the vets tommorow to get her in to be spayed
thank you

She won't be able to be spayed until she's showing absolutely no signs of a phantom.

how long will it last she has never had one before so never experienced it and a friend of mine her girl had a phantom but never got this far iykwim she made milk ect but just went bk to normal no digging and didnt mother teddys i feel so sorry for her she looks soo depressed

It could last a couple of weeks if you're strict with her; take away her toy so that she can't mother it, lower the amount of protein in her food and keep her very active - long walks and plenty of playing and training so that she doesn't have time to feel emotional.

Some can go all the way to "due date". Best thing to try and get her out of it is to remove all toys, cut down feed and up the exercise. Don't treat her like she is "pregnant".

Great minds JG

Its very important that she is not spayed whilst she is in a phantom.  She will need to be completely out of it and also not due to come into season either, can be tricky getting the timing right but its very important.

you could also give her evening primsose oil 1 a day, probably too late for rasberry leaf tabs as they need to be given first day of the season and continued for 12 wks.
Agree with othe posters removing toys etc also move her bed into a different area, dont let her mope.
If she is really bad ie temperament change and producing lots of milk, heavy panting  then you could see the vet and give her galastop as a last resort.