mistee - what type have you been diagnosed with then? you certainly sound t1 with the v high reading of 27 & losing 2 dress sizes??
a friend's dad was diagnosed as t2 and just told to take tablets with meals. he lost a huge amount of weight & my friend was v concerned about him, his readings were so high and he was wasting away. i told her to make him go back to his DSN and question whether he was t2 or could he be t1, he did, the DSN said he was t2 as he was in his late 50s (t1 is often referred to as juvenille onset because can come on in youth, not always tho - my mum got it @24, me @26. sure there are others on here to add to the stats). he carried on doing as he was told and steadily lost even more weight. i told my friend to get him to go pester and insist for more tests & help, this went on for the best part of a year, and finally he was diagnosed as being a t1. after settling into an insuline regime he put some weight back on and felt the best he'd felt for a long time.
he was in his late 50's so they were reluctant to look further. i know recently my experience of a few 'health professionals' who haven't really differenciated between t1&2, but they are very different. i often know more about my condition than the dr's & nurses at my practice - so i have little trust for doc's who won't investigate further.
for the record, at the time of my diagnosis i was 26 and had lost about 3 stone, was thirstly alot & weeing lots, was starting to get v tired too (thought my gym regime was responsible for all this). had been dismissed from 2 diff dr's with recurring boils on face (caused by excess sugar) & recurring cystitis & thrush (again, sugar) - they just said come back if it continues. when i got some results back from a yearly health check i took through private health care, the letter said seek medical advice. so i did...got into a diabetes clinic & got a meter, my glucose readings were hi 20s. sometimes at the start there is a 'honeymoon phase' where the pancreas is winding down and still produces some insulin so can look like you're not 100% not producing insulin (if you see what i mean!?).
interested to see what happens next with you...i'm saying all this presuming you've been diagnosed with t2? apologies if i have got wrong end of the stick!