Has he never gone on a business trip? Has he never flown on a plane? Have you never flown on a plane?
Do you have a cell phone? Do you have neighbors?
Really and truly, it's healthy to be able to cope on your own without your husband there. You actually need to learn to do it and not get so frightened by the thought of it. There are a lot of reasons to have this experience under your belt.
My aunt had never worked outside the home a day in her life. She raised 3 boys and her husband, my uncle, was military. He did ALL the business of the family. She had never even written a check before. He got sick. He had to have surgery (brain tumor). Long story short, as he was recouperating, he taught her how to take care of everything, including how to drive. (Yep, she had never driven either.)
She had 5 more years with him before the tumor came back and a heart attack took him. She thanked God everyday that she had a chance to learn WITH her husband, how to handle everything.
That's not what you want to hear on this thread, I know. Sometimes we need to know these things, even though they are unpleasant to think about.
Your husband is going to be fine. You are going to be fine. My husband takes business trips domestically and internationally. He used to travel to India for two weeks at a time. We missed each other but he was busy as he could be, and I was very capable of handling life without him. And G., he NEEDED (and needs) me to be capable. These business trips are very important and your husband needs to be able to focus on the work. Being willing to and able to handle these kinds of trips make him value-added to the company. Quite frankly, if my husband weren't willing to do this, he would not have been able to do as well with his company, and in the bad economy, he might have been one of the ones to be downsized.
So, I encourage you to rise to the occasion here, plan now since you have advance notice. (Sometimes I have 2 days notice - you've got it good!) If you don't know the details of your business, get your husband to help you with it. Write down all the particulars about your banking, various insurances, credit cards, etc. Ask him the name of his HR person and phone number. Know what your benefits are, where the tax papers are, and all of that.
You might not care about this stuff, but really, why not be a part of the business of your family! If you have a good husband who doesn't act like some men who hide things from their wives, then making this a joint effort is good for you both in the long run. People with good marriages shouldn't have a problem doing this.
Another thing you can do is do your shopping before he leaves, get your car serviced, and work on both of you opening Skype on your computers and practicing talking to each other. Does he have a company cell phone? If he doesn't, he will need to set up international calling capability. (I'll bet the company will reimburse him for the calls.) He can call you and say "Honey, open up Skype" and then hang up - doesn't cost much, and then you two can talk on the computer (and see each other too!) My husband and I email each other a lot too - little things in case we need to know stuff.
Before he leaves, help him clean out his wallet and only take what he needs with him. That way, if he loses his wallet, he won't lose all of it. Make copies of any of the credit cards he takes with him (including the back) so that you can tell him who to call to cancel the cards. (Truly, the odds of him losing his wallet are very small. Just do this because it's the smart thing to do, not because you really think he'll lose his wallet.)
Have him SCAN the copy of his passport page with his picture and pertinent info into his computer so that if he were to lose his passport, he'd have the page in order to get help with another passport. People should do that anytime they travel overseas, even for vacation. Make sure his passport is current and won't expire while he's gone.
Tell him to take pictures and send them home to you. It will make you feel like you are part of this.
If you TRULY think you're going to go over the edge with him gone, talk to your doctor. He can give you some anxiety medicine. I hope you won't have to do that because I really want you to come to the understanding that thousands and thousands of spouses, men and women, do this every day.
Good luck,
Dawn