In your results is stated that you have cysts on your thyroid gland and one in your kidney, but, not, in your lungs.
If one of your parents has PKD, you have 50% chances to develop it eventually.
In most cases of PKD, patients have no symptoms and their physical condition appears normal for many years, so the disease can go unnoticed.
Having hypertension or high blood pressure is one of the symptoms.
Frequent UTI's and, sometimes, pain in the area of kidney location, are another symptoms of PKD.
As your doctor said, having more that one nodule in the thyroid gland, is a presentation of multinodular goiter, linked to low activity of the gland, or hypothyroidism.
Having high levels of cholesterol, and, especially, high levels of triglycerides, can be a sign of hypothyroidism.
If the thyroid gland lesions are cystic formations, but, not solid, that are known as nodules, than these cysts can be benign tumors in which liquid has appeared as a result of degeneration, or, some bleeding, too.
Consult endocrinologist (doctor for hormones) to suggest you some further tests for your thyroid gland.
She/he can start with a simple blood test that measures thyroid hormones levels in your blood.
You can get an MRI to be sure for diagnosis of PKD.