Hi there
I am in a similar situation (except for the tallness, Im only 163cm) in that im 21 weeks preg and still dont have much of a belly at all (check out my website pics)...I also get comments all the time such as "what sort of a pregnant bellys that?" or "maybe next time we see you, you might actually look pregnant"...Only 2 days ago I told a girl that I do uni with that I was pregnant and she said "only just pregnant then?" I replied "Im 21 weeks" and she questioned me like she didnt believe that I was even pregnant!