Lots of women (and some men too) are hypothyroid - symptoms: (you don't need to have all of them! some people only have 1)

Fatigue
Weakness
Weight gain or increased difficulty losing weight
Coarse, dry hair
Dry, rough pale skin
Hair loss
Cold intolerance (can't tolerate the cold like those around you)
Muscle cramps and frequent muscle aches
Constipation
Depression
Irritability
Memory loss
Abnormal menstrual cycles
Decreased libido