You have rights as heirs of an estate, even if the will does not name you as a beneficiary. I want to stress that your situation is fairly complex (real property issues/construction of will issues/propriety of administration of estate) and you should seek the counsel of an attorney (sooner rather than later) to evaluate what you can do to protect your rights.
You should definitely consult with an attorney who has expereince handling probate disputes, because to give you advice about what could or should be done, an attorney needs to examine the relevant documents, including your mother's will. Most reputable attorneys will provide an initial consultation without charging you. Act quickly to avoid losing any rights.
I agree with the other attorneys, you should hire an attorney in the area where your mother lived. This should be done as soon as possible. There are many situations where adult children can successfully challenge a will.
However one mistake you made was to sign a quit claim deed to your mother. Arguably, this relinquished your future rights to the property.
In any event the attorney will explain your rights. You may be concerned about fees in hiring an attorney. However, the attorney should discuss with the you the possibility that the reasonable fees incurred in the challenge may come out of the estate.
I am licensed in Georgia, but I don't practice in your part of Georgia.