Type 1 diabetic with severe hypothyroidism symptoms

Hi, I'm not really sure what to do..... I am type 1 diabetic and have been for fifteen years since the age of six. I was told from routine bloods ages ago that I have thyroid antibodies and would eventually develop problems there and I'm pretty sure that this is what's wrong, but I am between a university doctors surgery who are never able to give me an appointment and somewhere along the line my last blood results from a diabetic review at the hospital back home were lost.

For ages I have been feeling tired, and less able to concentrate - assignments have taken a lot longer to complete and my grades have been slipping, and I put this down to just being overworked. It's only over the last month or two that it's started to get really bad and it also seems to be getting worse quite quickly now. I wake up in the morning feeling like I've barely slept despite having had plenty of sleep, quite often sleep through my alarm or just don't have the drive to get up and into lectures, have been putting on weight including what I think is water retention (according to the scales which are perfectly accurate for my housemates I'll fluctuate by up to 9lb... I know 2-3 is normal... and there has been some general increase and fat build up, which is unusual for me as I've always been slim and have a high metabolism. I'm also very stiff and achey in joints and muscles (I feel 80 not 21!) and weak, my moods really low can't stop bursting into tears and can feel nothing but apathy for my exams next week- which is really unlike me- my mental focus has gotten so bad, basic maths and common sense is taking a lot of thought (and I'm a science student!), even this is taking me ages to write and I have no idea why. I've started to forget what I'm saying mid-sentence or just say the wrong words. I've also been feeling the cold (and the heat) a lot more and everything in my body feels slower (digestion, heart-rate and breathing etc) as well as water retention in stomach bloating, my legs definitely are too which I've never noticed before. If something presses into them, the indentation will stay much longer than expected.

I'm really trying to push through this, I'm normally so determined and able to get through things, but don't feel able to this time, cannot cope and do not know who to turn to for help. I've tried revising, but simple facts which I've learnt from the course this year have just gone from my head and I can't absorb the information, I've even fallen asleep at the computer. I'm avoiding my boyfriend and housemates/ friends because I don't want them to see me like this (I look and feel awful) and I also feel like I'm just being silly. I just want my normal energy, optimism and mental ability to be back so badly... I've never felt so strongly that I just want to give up on uni and go home, but I know that I would definitely regret that.

I'm really sorry to anyone reading this about the massive essay and the probable lack of structure and bad grammar! And if I'm just venting quite a bit of frustration too. I just really need some advice and especially if I should be worrying. I'm so sure that it is hypothyroidism, but would it have progressed this quickly even? Could it be something else or just stress (even though I don't feel it and have been under much more pressure without negative effects). I know that it seems so obvious to just go and get the blood-test redone , but I can't even get to see a doctor and don't even feel well enough to manage the walk into the city. I don't want to just go into A&E if this will just be wasting their time, I just need to know if this is what I should be doing as the severity of symptoms has become so bad.

Thanks so much!