Roxanne, I am so sorry to hear about your husband and my thoughts are with you. Like others have said, take some time in making the decision. Physically, there should be no reason that you couldn't move forward. However, as a lot of people here (including me) have experienced, depression may very well set in just from the surgery/meds (?) alone. I would be concerned that with no immediate support system in your home with you that the recovery could prove to be extremely difficult in compounding your grief with this "recovery depression".
Best of luck to you, and please let us know how you're doing.