Have her spayed, immediately if at ALL possible. At 10 -11 months, and 2 1/2lbs, your girl will never be big enough to be safely bred. Why have you let her go 4 weeks now, surely you were not hoping to complete this pregnancy?
If you continue with this, you may lose more than breeding ability, you may very well lose your little girl!
And, who ever sold you this dog with full breeding rights, should not be breeding!
