Gas or baby?

I'm not really sure how I'm supposed to know.  I'm just sitting here & I felt this fluttering around my belly button.  I don't even know if my baby is that high yet, I'm terrible.  It's not the 1st time I've felt the fluttering, I feel it in different places & have felt it lower than my belly button, but I'm just not sure if it's the baby.  I don't want to get all excited only to find out it's just gas & on the other hand I don't want to be feeling by baby this whole time & not know it.  Just sitting here thinking I have bad gas.  A lot of women on my msg board have started feeling their babies moving around.  I'm feeling a little behind.  I'm the pregnant woman who won't know it's the baby until I get a strong kick!  Which sucks bc I don't want to miss out on all these little moments.  Oh I hope I feel the flutters again.  Even if it is gas, it's gas bc of my baby, lol.  So I'll just smile anyway.  Ok, I'm rambling now, so I must stop.