I'm 18 weeks.
I ate some weetabix, ate 1 1/2 of them and then realised that they tasted soapy. I spat out the soapy bit. The weetabix packet is kept under the sink and I realised that the sink had been leaking (washing machine drains to pipe too) and that the weetabix had absorbed some of the sink / washing machine water from the leaking pipe. I immediately induced vomiting and I'm pretty sure I vomited my entire stomach contents. The amount I would have ingested, even if I hadn't have been sick would have been small as the leak was small and the weetabix were dry when I put them in the bowl, but the packet was stained like it had absorbed some of the water.
I'm sure there's nothing A & E would do.