Ok I am 18 weeks and have no baby bump yet. I have gained 7 pds but you cant tell I am prego.
When did you start showing?

I am almost 31 weeks, and people still can not tell that I am prego. I don't have much of a bump, and thinking I probably won't have one. I haven't gained any weight, actually still down about 10 pounds, but baby is growing and we are both doing well so that's the main part.

8 months.  I had a business meeting a month before my due date and the lady i met had no clue I was even pregnant.  it was so sad.

I'll be 20 weeks soon and started noticing the bump around 18 weeks.

It really depends. Some show early, some don't show until close to the 3rd trimester.

I'm 17 weeks and haven't gained any weight but I have a very obviously "pregnant" bump.
This is my second pregnancy, the first was twins, so I think that has something to do with it. With my twins (pre-WLS) I didn't show until 20+ weeks and had gained 10+ lbs by then.

Around 20 weeks for me.