Weight gain blues

I know we're supposed to gain weight, is normal, there's no doubt in that....but at the beginning (up through week 17) I was as sick as a dog and barely gained any weight, yet baby boy was still healthy. Now at week 36 the weight has been steady gaining, along with my depression from it. I just stepped on the scale at home and when it read 200lbs (up 50lbs from my pre-pregnancy weight) I couldn't help but cry! I should also mention that I am an insulin dependant type 1 diabetic (10yrs now) so I am already on a restricted diet as it is. I'm at a loss for words as to why this is happening so suddenly. I feel huge, but don't feel that I LOOK 200lbs :( Unfortunately the scale doesn't lie. Anyone else having weight gain blues?