Hi Linda, I just want to tell you to please, please don't worry! The weight you have put on is completely normal, and it was very rude and unprofessional of your OB to say otherwise!

I know how upsetting it can be though... I put on HEAPs of weight during my pg (40kg) and my GP asked me to tell her what I was eating, so I told her I had 4 weetbix for brekkie every morning... and she went off at me saying 'no one eats 4 weetbix, you should be having 2 max, no wonder you are piling on the weight!'
Anyway, she made me cry, and needless to say I never went back to her...
Sorry to get off topic, but yeah, I know how upsetting they can be.

I wouldnt be worried at all if I were you... by the time I was 18 weeks pg I had put on about 17kg I think... 8-[
So IMO 5kg is next to nothing!
And like the other girls have said - you will lose most of that weight within the few weeks after your bubby is born.

Chin up, and dont let that nasty ob get you down, just concentrate on being healthy for your precious little bundle inside, who cares if you gain a few more kilos!