Sandpaper Rash and Diarrhoea

[Evenstar]

I haven’t been feeling well since Friday and started having diarrhoea on Saturday, I have severely limited my food and slept most of the day yesterday but still have diarrhoea today.

My neck and chest have been itching terribly and today it feels like a sandpaper texture though it is colourless.

I have been in contact with someone who has had vomiting and gastric symptoms for 3 weeks, but not close contact and her doctor thinks it isn’t food poisoning which was the first diagnosis. I have also been in contact with cats at a rescue I help at, some of them have diarrhoea.

Should I try and get a GP appointment or just wait it out?

I would get a GP appointment. If it's too far out, check in with 111 or whatever arrangement your surgery might have after-hours. Might be nothing, but if there is something going on, best to get it seen to quickly.
And make sure you replenish your fluids.