Were you prescribed something like Levothyroxine, Levothyroxine is taken to replace the missing thyroid hormone thyroxine  those of us who have thyroid problems get medication and regular blood tests this helps with all the problems associated with an underactive thyroid.

If you were not prescribed something please go see your gp, and explain what going on.

Sometimes they need to do blood tests to see if you are prescribed enough or too much, if however you have being prescribed something, you might need the prescription adjusting.

Also note that although Levothyroxine starts working straight away, it may be several weeks before your symptoms start to improve.

I'm no expert but honestly, that does sound to me like your thyroid levels might be off. If it was your depression coming back, I doubt it would make you cold and anyway, it would be quite a coincidence if you developed a bout of depression just after an operation that can cause depressive symptoms along with difficulty getting warm and brain fog. I am guessing they are still adjusting your medication? So it may be that they haven't got it quite right yet.

Those do sound very much like the symptoms of thyroid levels being low so I would guess that is what it is. Have you told your consultant about your symptoms? They might adjust your dose.

I didn't personally have those symptoms after my thyroid was removed, but they were all symptoms I heard of as possible (except the thirst).

The pins and needles, by the way, could be low calcium. Were your calcium levels checked after the operation? I did have my calcium levels drop. They usually return to normal within weeks or months and in the meantime are easily dealt with with tablets. You should definitely tell your doctor about that. Taking calcium might well sort the pins and needles, but obviously, check with a doctor.

Hi both, Thankyou for taking the time to message me. 
 

I had bloods done last week as my calcium has been all over the place since the op. They nicked the para thyroid during the removal. They said my calcium levels were fine last week so I'm not sure, maybe they've gone back up and thats why I'm so thirsty, it's a side affect of too much calcium they said before, but I havnt changed anything so I'm not sure. 
 

as for my thyroid levels, they havnt been checked yet, they prescribed me 175mg of levithyroxine and so far it's been fine but it's just all come crashing down over the last week I guess. 
So perhaps you are right and it takes a while? 

after posting here I thought how silly I was talking to you all when I know what I should really do, so I called the gp and asked for bloods to be done on my thyroid levels as I do think it could be down to that and they said I need to book an appointment so the dr can determine whether they are even needed. Frustrating but I guess that's how it is, I can't just demand a blood test. The consultant said last week after my calcium blood test and surgery results check up that that was us over and done with and the next stage for me is the cancer centre and radioiodine, I feel in limbo a bit right now and so maybe that's contributing to the emotions, I'm just so so so teary it's rediculous.