I have been treating with an endo because I have the symptoms of PCOS (Polycystic ovarian syndrome). I am 28 but at about 18 I started to develop facial hair & it has gotten worse thru the years. I have never experienced any ovarian cysts and was able to conceive without trouble. Also, I have weight gain problems and difficulty losing weight. I am highly irritable, constantly tired, lazy, small appetite, wake up with a congested sinus daily, monthly neck pain such as a pulled muscle & constantly hot so I keep my AC at 68. Every month before my period I get something similar to a kiloid cyst along my groin that swells up so bad it hurts to close my leg & sometimes it needs to be drained because it is develops a bit of pus but it disappears right after my period. After my init visit 9 mths ago, my blood tests showed normal creatiane & testosterone hormones & normal thyroid levels except that my thyroid antibodies were high & my vitamin D was extremely low. My doc felt that my thyroid was enlarged & I had symptoms of PCOS so he prescribed meds anyways. I was given spironolactone, metformin, synthroid & vitamin D 10,000mg. After a mth, vitamin D, my vitamin D & antibody count was normal but my thyroid itself was still enlarged. Fast forward 9 mths of meds & my vitaminD is once again low despite milk & sunny days & although my hormones & TSH levels continue to be normal, my thyroid is even further enlarged. Twice a month I get horrible neck pain that lasts about 1 week to go away, I cant step into a humid environment because I get congested and an immediate sinus headaches that turns into a migraine with dizzy, short of breath & nauseous. I have also been experiencing daily difficulty breathing as if my lungs are not getting air fast enough but not in the same manner as an asthma attack. I feel my pulse racing when I dont get enough air. The bp is normal (110/70) but my pulse rate is btwn 107-110. Doc wants thyroid ultrasound. What could be the cause of my problems.