Dang, my comment did not post yesterday...
A CT is not appropriate for pituitary issues. Your doctor is NOT skilled in pituitary issues. Please get copies of the tests you have and find another. You need a dynamic pituitary MRI to find a potential pituitary issue as well as a boatload of hormone testing and the testing has to be done correctly.
TSH and T4 alone do not really cover the thyroid - antibody testing and Free T3 and Free T4 really tell what the thyroid is doing. TSH is a pituitary test. I hope at least the lab used the newer range - .3 to 3.0.
Cushing's can be caused more likely by pituitary (most common) then adrenal then ectopic (tumor anywhere in the body) so again, then endo is not guiding you correctly. Steroid use is the most common if not a tumor. You have to find the source and treat it - and it can be tricky. I had the disease myself.
I also had PCOS - there is a lot of overlap. Having one does not preclude the other.
"What are the symptoms of polycystic ovarian syndrome (PCOS)?
The principal signs and symptoms of PCOS are related to menstrual disturbances and elevated levels of male hormones (androgens). Menstrual disturbances can include delay of normal menstruation (primary amenorrhea), the presence of fewer than normal menstrual periods (oligomenorrhea), or the absence of menstruation for more than three months (secondary amenorrhea). Menstrual cycles may not be associated with ovulation (anovulatory cycles) and may result in heavy bleeding.
Symptoms related to elevated androgen levels include acne, excess hair growth on the body (hirsutism), and male-pattern hair loss.
Other signs and symptoms of PCOS include:
obesity and weight gain,
elevated insulin levels and insulin resistance,
oily skin,
dandruff,
infertility,
skin discolorations,
high cholesterol levels,
elevated blood pressure, and
multiple, small cysts in the ovaries.
Any of the above symptoms and signs may be absent in PCOS, with the exception of irregular or no menstrual periods. All women with PCOS will have irregular or no menstrual periods. Women who have PCOS do not regularly ovulate; that is, they do not release an egg every month. This is why they do not have regular periods and typically have difficulty conceiving."
Excerpt from MedicineNet - Polycystic Ovarian Syndrome