18 weeks

I’m 18 weeks today with my second child and have not gained any weight (I lost 12 pounds in the last 2 months I now weigh 136 pounds) I do feel slight movement. I’m not getting much of a baby bump either I’m starting to worry. The doctor won’t see me in person unless it is an emergency I haven’t seen a doctor since I was 8 weeks along.. 😬 am I just worrying too much?