Background: Family history of hypothyroidism. I was diagnosed with it after I had DS2, so around 11 years ago, and was on 175mg Levothyroxeine until early last year when due to various issues with my then GP I ended up with no GP and no meds. I was very bad and didn't get around to registering with a local GP until DS2 was ill a couple of weeks ago (we're generally pretty healthy!) and I had a blood test last week.
I get that this is Not Good, given that the hospital itself rang me on a Sunday over the results, and then my GP rang the next day to insist I came and picked up a prescription straight away instead of waiting until my appointment this morning.
My previous GP never gave me actual figures with my blood test results, and I never thought of asking tbh (my bad). From her reaction I get that 150+ for the TSH is pretty crap, but I'm slightly freaking out and a bit bemused by everyone's reaction to it. I'm kind of getting the feeling I should be feeling worse than I do, or maybe I do feel really bad but just haven't realised!
I know I need to educate myself a bit more, but googling throws up all sorts of stuff. I have to admit I've always seen this as something that's annoying rather than a real health issue. I know there's a few people on here with hypothyroidism, I remember threads from a while back, please point me in the right direction to learn more without getting confused or alternatively scold me thoroughly for being an idiot with my health 
I'm disappearing for a bit as I have to take a doctors note to work, bloody asthma is playing up after a chest infection and I gather that's probably because I've been off my meds too 
TIA for any help/words of wisdom