It is really scary to be the child of an alcoholic. It can screw up a lot of stuff, I know. It doesn't really sound like you have a problem, and just the fact that you're thinking about in those terms, probably means you don't. Having a drink or two a few nights a week is okay. You've seen your mom when she's drinking and you probably know (or at least your husband should) that you don't act like that and you don't NEED alcohol the way she does. I would suggest maybe finding a support group to help you talk about some of your concerns and issues. Alanon is a nationwide group and I'm sure there's one in your area...try Googling it.
It is totally possible you can turn into an alcoholic, it is genetic. BUT...again, the fact that it's forefront in your mind is a good thing. Also, most alcholics and other addicts have a point in which everything shifted for them. A moment in time when something happened and they stopped coping. If you find yourself using alcohol as a coping mechanism instead of dealing with your issues head on then you need to get help immediately.
It sounds to me like you're totally normal! Hang out with your hubby and enjoy a glass of wine or two, it's okay.