First week: 2 days of perfect potty use and now tantrums and mess

[sidonie1]

My boy is 2 and 8 months and started potty training six days ago. First two days were tough with lots of poos and wees in pants; third and fourth day were perfect - potty use for all wees and poos. Yesterday and today have been so bad. Not only is he messing and wetting his pants, he's also been tantrumy and grumpy and whingy. I am trying hard not to get angry but am trying to discipline him for whining and being rude, while being upbeat at positive about potty training. Argh! Any thoughts or experience? Maybe he's ill, but doesn't seem it, or the hot weather'a turned him crazy.