Irrational fear of my bump never showing due to my weight

Hi ladies, I'm currently 6 weeks 2 days pregnant carrying my first child - I'm usually around a size 12-14 (which I still am in the picture - although I do have bloat). I have had an anxiety disorder in the past which (thankfully) I have overcome however I keep irrationally thinking that my pregnancy will never show, I'll never have a bump because I'm too 'big' - I know this won't be the case and I should show later on but it's causing me a lot of worry for no reason. Does anybody have any advice about this? Or have they been through something similar themselves?