I am assuming that you did not icnldue an addendum limiting the offer time. Feel free at any time to contact your realtor and ask when the offer was submitted and if they have heard anything. Remember until the time the offer is accepted, it may be withdrawn. Thus it is always in the best interest to respond timely. Some folks are quick to respond while others have to mull it over. Many times there are several family members involved as well and additional time to respond would be needed. Either way, your realtor should be able to make contact and obtain and eta for response. Good luck.