Is it normal for a woman about to turn 41 to experience a huge increase in drive?

Started about 2 months ago, I have been to shy until lately to share with my husband of 15yrs. these feelings. He has been very supportive I have been on my diet for a little over a month and lost 12 lbs. last month. I have almost completely cut out carbs from my diet. Could this be it? Is this a symptom of menopause? I have always had a health drive but lately it has increased alot. I am starting to hurt my husband and he wants me to see a doctor.Help!