I am a DIE-HARD coffee drinker and have been so for about 15 years. I did cut out the Dr. Peppers and every so often, maybe once every couple of weeks, I give in and have a diet Dr. Pepper. But I don't like artificial sweeteners so I try to keep it very infrequent.
I cannot remember if caffeine has any adverse affects at the cellular level w/thyroid hormones. I know it affects the adrenals, which in turn CAN sometimes affect thyroid function. Since I have weaned off a lot of the sugar and caffeine, I do feel loads better. But I just can't drop the coffee and tea, lol. You are right, it does help with hunger pangs. I still have to wait about an hour after morning coffee to actually eat breakfast b/c I am still not hungry.
You are at a very crucial mark in weight loss, so it is not impossible, but it is a tougher spot to be in, those last 10 lbs. But it is GREAT that is all you have! Most thyroid people have 30+ lbs to lose so I am glad to see your doctor didn't let it get out of control.
A lot of my loss came from simply switching my thyroid meds. But then the loss just stopped and I chalked it up to being all on me at that point.
There is no questioning whether or not you are getting an adequate workout. All you have to say is "Jillian" and everyone pretty much knows she's killing you, lol. If you are already increasing cals. a couple of days a week and it is not working, you may want to start tracking everything over the next week and get an exact figure of what you are taking in. You can then look at it to see if, in combo with the higher cal days, even lowering a day or two out of the week by just 100-150 cals (no less than 1200) would work. And then do the 1400 for the other 3 remaining days.