Unfortunately, I don't have good news for you. You basically have three options:
1) You can apply for an SB-1 Returning Resident visa and prove that your absence from the U.S. was beyond your control and the length of time outside was reasonable due to the circumstances. Here is a link:
2) You can attempt to enter the U.S. with your green card. You most likely will not be lucky enough to get by. They most likely will confiscate your green card and parole you into the U.S. They will schedule you for removal proceedings and you would have to prove to an immigration judge that you did not intend to abandon your green card status. That can be proven by evidence to the contrary such as that during the time you were away, you were still filing U.S. taxes, maintaining a home in the U.S. and paying that mortgage or rent, maintaining a U.S. drivers license, U.S. bank accounts with significant movement, etc. Luckily, assuming you are still married to your U.S. Citizen husband, he can petition for you all over again for you to stay. Because that is a possibility, they may not bother with placing you in removal proceedings at all since they won't want to waste the time or money. That's about the only thing going for you.
3) Your husband can file a K-3 or IR-1 process for you, but as you probably know, the K-3 will take around 9 months to process and the IR-1 can take around a year or so to process. Here is a link:
It is really up to you, but I think you should try option #1 first.
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