How long can I hide this from work? 13 weeks Tom.

Hi long story short. Had a MMC at weeks so I am trying to hold off as long as possible to tell work. Today is casual Friday and winter in NJ . I am able to wear hoodies. For the rest of the weeks I am trying to wear flowy shirts. This is my third pregnancy with one living child. I’m 5 7 165 and haven’t gained weight yet but my stomach looks pretty heavy. Is this normal? Do I look ok? Can I hide for how long you think? Sorry I’m rambling