I know how this sounds, but please believe that I am a clean person and always disinfect my bin with every bag change!
I am currently 8 weeks pregnant and really struggling with nausea, so DH has been doing all the cooking and feeding our cats. It turns out he's been putting food waste and empty cat food pouches in the kitchen bin rather than taking them outside like I (and most people) would. Today I discovered that said bin was full of maggots!! I only found this out when I saw two on the floor and did a bit more investigating 
I still don't really understand how this happened as surely a fly must have got in the bin
but that's beside the point...
I am really worried that I have been using the bin within the last few hours and had no idea. I know we have to be extra careful when pregnant and I am so worried I might have somehow done some harm. Am I overthinking it? New bin will be purchased tomorrow 