Make an appt. to see a psychiatrist so the two of you can determine the best course of treatment for you...therapy and/or medication. It's wonderful that you recognize that your eating to ease your depression and that's a good start! I'm sure you are monitored on a regular basis with your medication and bloodwork. I have hypothyroidism and I'm monitored closely. Depression can be caused by a chemical imbalance where only medication can help, or it can have a root cause which is normally something traumatic from your past which you never truly dealt with. Rarely are we aware of what is was that happened, and this is where therapy plays a big part. We can learn so much about ourselves and why we may be suffering from depression. Often it's something we thought we had dealt with and neatly tucked it away, but when we do this.... it comes back demanding to be dealt with in the form of depression and/or anxiety. It's good that you have realized this early so that you can get help and get this under control quickly. You're not alone and you can beat this, you just need a little help and that's okay. I hope this helps and keep us posted, we're always here for you.
This is what I found on the internet as I don't know a lot about it. Just to get you started:
Work with your health care provider to ensure that you are taking the proper dosage of your thyroid supplement. Make sure your hormone level is monitored closely. This is essential to your daily quality of life. If you are not on the proper dosage, other than weight gain, you could suffer from additional symptoms such as depression or puffy skin.
Read more: How to Lose Weight After a Thyroidectomy | eHow.com http://www.ehow.com/how_5664490_lose-weight-after-thyroidectomy.html#ixzz1S0MgjC00