I had a few people say things like that to me when they found out we were pg. We had only been married 6 wks and my sister was 8wks further along in her pg. Everyone thought it was an accident or that we secretly got pg before the wedding or even worse that I was trying to steal the lime light from my sister!
I just smiled and told them that it was a surprise and we felt so blessed and to be able to have children so easily... even though we hadn't figured on it happening quite so soon.
I'm 35 1/2wks pregnant now with a very healthy little boy and everyone is so excited. Hope your friends and family come around to the idea and support you both in this time, there is definately enough to deal with without others giving you crap.