Hypothyroidism, a condition where the thyroid is not emitting the amount of hormone your body actually needs, can cause
depression, aching joints, muscle weakness, constipation (which can lead to more gas I think),
and hair loss. See PM.
Please consult your physician about these symptoms and ask if they will check your thyroid function, including free T3 and free T4 levels, not just TSH (thyroid stimulating hormone that comes from the pituitary).