Freaking out-15 weeks

So I’m 15 weeks pregnant and even though I’m over weight I can’t seem to understand why my pregnancy symptoms has gone... completely gone away. Also, why is my lower belly smaller and softer than my upper belly. Its my second baby and I don’t feel flutters either. I’m super anxious cause I had a miscarriage before this one. Im scared to she a silent miscarriage. I saw the ant two weeks ago and she was fine.

Please help!!