Hypothyroidism.?

I was recently diagnosed with hypothyroidism.. i've only know about it for about 2 months. I haven't been to the doctor since then. But I am having a really hard time losing weight. I'm practically starving myself, and this medicine does make you hungrier. I have also been excercising. I had a big glass of water and several green teas yesterday and I got on the scale last night and I gained 6 lbs. So that kind of got me down. I guess the medicine makes you retain water. I've gained about 20 lbs from this... at the moment I weigh 166.5 and I am 5'5, and currently none of my jeans fit me and same with most of my shirts. I know I can't increase my dose any further b.c I've already started taking 12.5 MCG more this week then what the doctor prescribed me. Simply b.c I had been taking 25 mcg for a month and it really wasn't doing much for me. I take Levothroxine.

Can anybody give me advice on what to do? Should I take a water pill?

I know some of you make think I shouldn't have increased my medicine without my doctor's permission. But you must understand that with thyroid medicine a lot of the time you have to pay attention to how the medicine is making you feel. B.c if you are taking too much you will feel hyper, have a high heart right, heart palpatations, lose weight rapidly, and just get sick. And then if you don't take enough you go hypo and you'll feel tired, constipated, weak, and gain weight. I was feeling a bit hypo, that's why I decided I needed to increase my dose a bit. I was just diagnosed with this so it might take me a bit to get my dose adjusted to the right amount...
The doctor can't really figure this out on their own, b.c you are the one who is being effected by the medicine and your the only one who knows how it makes you feel. That's why most people that have hypo adjust their doses on their own.

Your dosage should be adjusted every 6 weeks or so with the goal of getting the first thing in the morning TSH around 1.0. Failure to get it around 1.0 will result in difficulty losing weight.

If after 6 months on Synthroid you still don't feel any better get your free t3 level done. If its below midrange it means you are a poor converter of T4 into T3. That would indicate to either add T3 or switch to a T4/T3 medication.

As far as diet, don't go too low with calories or you will further slow your metabolism. Don't go lower than 1200 calories. Reduce carbs and increase fiber.

do not take a water pill

Exercise 4-5 days a week. see thyroid weight loss forum link below