Child had some nightmares, but it’s normal. He is too young to have proper dreams. Also it seemed that his body temperature is quite low, but the boy has spent an unknown period of time outdoors on the November night, so of course he will be ill. Reverse will be too strange. Dr. Tonks checked Harry a few times and said that it’s unlikely for him to be ill at that point, it’s more like a long term consequence. A huge amount of time passed, it’s too long to have anything normal. Also it was quite financially difficult to have two babies, but Vernon got a promotion. And now Petunia can tell everyone how wonderful her husband is.