I don't understand why you want your home back.
Also, did you get what you were asking for for the home? If you did, you will owe your Realtor the commission. If not, the buyer could sue you.
You will need to hire a real estate attorney to give you legal advice.
(215) 669-0589 Direct
(215) 358-110 Office ask for Renee
Michael Kuldiner, Esq.
Law Offices of Michael Kuldiner, P.C.
T (215) 942-2100 | F (215) 942-9664
Michael@phillyesq.com | http://www.PhillyEsquire.com
Bucks County Office (Main Office)
922 Bustleton Pike, 1st Fl.
Feasterville, PA 19053
1420 Walnut St, Ste 800
Philadelphia, PA 19102
Talk with a real estate attorney.
You don't mention your Realtor, talk with them also. If they don't have an answer, talk with their broker.
As in any transactions, most things can be negotiated. My guess is that this could end up being an expensive experience for you.