My 20 month old DS2 has suddenly (last few hours) started limping badly - he basically can't seem to put much weight if any on his right foot. He was fine (I think) first thing this morning (and went for a long walk yesterday), but I took him shopping this morning and he was surprisingly content to just sit in the pushchair for ages. At the supermarket, I got him out of the pushchair as he always walks into the shop - but he was pulling heavily on my hand, walking extremely slowly and with a pronounced limp. But he didn't seem to be in any pain. When we got home he was the same - wouldn't walk into the house, and when I put him down inside he basically just stood there. Took a couple of steps and again limped badly. What should I do? Doctor has no appointments until tomorrow. NHS symptom checker says go to A&E, which sounds a bit OTT - but maybe it isn't
? Any advice please, assuming he's the same when he wakes up from his nap?