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First, if it's 25 years until you retire, then you're absolutely fine. Look up "dollar cost averaging" and take comfort in the fact that any money you put into your stocks right now is buying more stock - which will go up when the market does. And it will. It will go up and down several times between now and your retirement, but because of dollar cost averaging you will end up better off than your husband. Now is a very good time to not do anything to your stocks. Panicked people rarely make the right decision. You would probably end up pulling all of your money out of stocks when they are low, which is exactly the wrong thing to do. But that is what people do - they sell when stocks are low (because they're afraid of losing everything) and buy when stocks are high (assuming that something that is already strong will only get stronger - bad assumption, by the way). Sit tight. Listen to that voice telling you not to do anything. Even experienced agents don't know what to do right now.
Second, open up some lines of communication with your husband. You should be able to talk to him about this. If you can't, then get counseling.