Weight gain. Stressed. please help.

I have had irregular menstruation problem since beginning but I was never overweight. At the age of 21, it was detected to b pcos. So my proper treatment began. But in vain. Rather, I suddenly gained a lot of weight which I could never shed even after all my efforts. Then I tried with another doc. After 2 failed attempts, doc recommended thyroid test which came out to be 11.98. Ever since I have been taking thyromed, the dose varied according to my condition. But still weight loss was too difficult. This January doc stopped medicines completely and suggested me not to take any. So i did. But fearing all the bad symptoms I have had (anxiety, sever anemia etc) I opted for ayurvedic medicines. Though I got periods every month but like after 35-36 days. I recently joined gym n I missed my periods completely. My last date was 11 May. I had spotting for 3-4 days after which it stopped. But my weight has spiked 2 kgs within last 5 days n still going up. I feel extremel stressed. Please help.