It could be but it could also be other things. Look here..
It May Be Menopause, But ...
"What I see most frequently misdiagnosed as menopause is hyperthyroidism," says Dr. Warren. That's because the symptoms, which can include flushing, sweating, heat intolerance, heart palpitations, and sleeplessness, can easily be confused with those of menopause.
In hyperthyroidism, the thyroid produces excess amounts of thyroid hormone, thyroxine, which overstimulates organs and speeds up many of the body's functions. If left untreated, an overactive thyroid can cause a loss of bone mineral density, which, over time, can lead to osteoporosis. Hyperthyroidism can also result in an irregular heartbeat, which can lead to stroke or heart failure. Unintended weight loss almost always accompanies an overactive thyroid. So if you're losing weight but not dieting, your heart frequently beats rapidly, or you're always hot even when people around you are cold, don't just blame menopause. "There's a difference between the intermittent flushing and sweating associated with menopause and being hot and sweating all the time that is not menopause," cautions Dr. Simon.