Hi!
Sounds alot like hypothyroidism. This can be checked by a blood test generally a TSH, but possibly even a T3 and T4. Any doctor can order this for you.
Take Care!
Check with your physician... perhaps, it's a bad blood circulation... do you feel cold in your limbs, or all over? It could also be a thyroid problem... visit your doc and he will help you.
Good luck! :)