Wow! I can't believe that your doc told you to get rid of your husband because he is on the road a lot... If yhe is abusive... then for sure, but if he's not, and you love each other, there must be another solution. maybe you need to get comfortable with yourself, wheather you are alone or not. I would think that that was the deeper issue.
i freeak out a bit too when my boyfriend goes to the cottage for the weekend and I stay home, but I used to have a friend stay over, now we have a dog who is very protective and makes me feel safe.
leave your husband if he makes you unhappy, but not because he works on the road a lot...
just my opinion ;p