Where's my baby bump?

For the past couple weeks, I've been obsessively googling what other mama's baby bumps look like that are in the same week of pregnancy as me. I'm 17 weeks as of yesterday and it's alittle discouraging for me to see these mama's with their cute little baby bumps and I look down at mine and think "where is it?" People at work asked to see my bump since I've been wearing frumpy sweaters but when I showed them, unfortunately there wasn't much to show. Most people said I look thinner and it doesn't even look like I'm pregnant. I know I should be feeling "flutters" in my belly soon but so far nothing. My first/last ultrasound was at 9 wks when I first met my OBGYN. I heard my baby's heartbeat about a month ago. And so far, pregnancy has been smooth sailing. It kind of makes me wonder if everything is ok in there though and I'm growing alittle worried. My bf is worried too but I try to be optimistic and keep him in good spirits. I have an appt at my 20wk mark, which is in a couple weeks, and hopefully we'll get to find out if it's a boy or girl! I'm so excited to see my baby again. It'll be our New Years surprise! I just can't wait to hit a growth spurt and feel little flutters til then. I was thinking of maybe scheduling an appt sooner to put my worries at ease and give me peace of mind but I'm not sure yet... This is all normal right? Should I wait?