
If you are asking whether your girl might be pregnant or not then the chances are that she is - especially if they tied. Have you had her checked by your vet? You cannot name the breed but could you give details as to size, age, type (toy, pastoral etc)?
You will need to buy The Book of The Bitch and read it pretty quickly. It will tell you what you need and what you should be doing. You will also need to start worming your bitch from 40 days in to pregnancy, every day until she whelps.
She should be hungry and wanting to eat at this stage but if she isn't and is drinking a lot, she may have some internal infection going on. You need to get her to the vet and follow their advice.
Telling you that you should have read up on all of this before allowing your dogs to mate would be pointless now. Also telling you that if this was an unplanned mating, then taking her to the vet and having an injection to stop an unwanted pregnancy would be pointless now too. But that's what you should have done. If however, this is still an unwanted pregnancy, you could take her to the vet and have her spayed now and stop it from progressing any further.
Having had a litter 2 days ago and having spent swell over £1000 so far on pregnancy supplies, vet bills, stud fees and travel so far, I hope you are prepared financially for this litter. People here love their dogs and are happy to advise as long as you are willing to listen, don't take any criticism personally and can be as honest about the situation as possible. Good luck.