Everything you describe points to her not only being pregnant but probably not far off whelping!!
I work for rescue and if you need any help do give me a ring ok? 01268 466616 (Wagtails Rescue, Essex).
I'm presuming you haven't been in this position before either, so i am more than happy to take your angel in for you and deal with her whelping. I would also recommend that you rehome via rescue if you can. SBT are being PTS at an alarming rate of 50 a week and all rescues are full to the brim. There just aren't enough homes for the amount of Staffies being born!
I'm not judgemental (you'll know by my posts) and i understand that these things happen. My offer is there for you ok?
Best wishes, and give me a call if you need me.
