Thanks for your question on Healthcare Magic.
I can understand your concern.
Yes, you should definitely go to your doctor a day get yourself checked.
At your age of 40 years following are the likely cause for your symptoms.
1. Anemia
2.
Hypothyroidism 3. Hormonal imbalance due to perimenopausal age.
So better to consult your doctor and get done
hemoglobin estimation, thyroid function test and hormone levels.
If all these are normal then no need to worry for major illnesses.
Sometimes, undiagnosed stress and anxiety can also cause similar symptoms.. So
consult psychiatrist and get done
counselling sessions. Try to identify stressor in your life and start working on it's solution.
You may need anxiolytic drugs too.
Don't worry, you will be alright but
consult doctor and discuss all these.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.