Baby bump #2 already?

My son is 2.5 and was a reasonably huge baby at 10.2 lbs. I've lost weight in the past few months and now weigh 30lbs less than I did when I got pregnant with my son. I'm now about 5 weeks and am getting a belly. I know, I know, I'm just bloating.. Will losing all this weight make me show sooner? I know with consecutive pregnancies you show sooner as well.. I've been through pregnancy, this should be like riding a bike, not seem brand new!!