18 weeks!

Hi ladies I'm officially 18 weeks 2 days! I am a second time mom with my son who is five so it has def been a exile since I was last pregnant! I'm super nervous about everything! Becoming 18 weeks I've felt some movement but I don't feel it all the time. Is that normal? Also for this to be my second pregnancy I'm not really showing.. :( I'm also a little bit of a bigger girl.. Not much of a flat belly here! I find out the Gender Dec 1st an I get so anxious cause I feel like it takes so long to get in the doctor and that def always gives me reassurance everything's okay!