Is his behaviour normal? Do i need to worry?

[Mrsjbxxx]

Hi All, Im new here so not 100% on how this works. My 4.5yo sons behaviour has seriously gone down hill recently. Hes been getting angry, lashing out and generally not listening to a word i say. Even if he could be in danger! (I know kids do this) anyway yesterday when we were sat together watching a movie he said (what i thought was jokingly) im going to wee on you mummy. I said no babe you know where to wee and thats dirty to do that. About 5 mins later he stands up and pees allover me face and everything. I was so shocked. Then today he has peed on the floor twice he knows what hes doing. He gets lots of attention from me and my husband. Can anyone help please ? Has anyone been through this? Thanks

Oh my you poor thing.
My dd is the same age and although I don't think she would do that, she is telling me no constantly, and having major tantrums.
Speaking to lots of mums who's dc are starting reception say they are experiencing similar issues. It could be the big change ahead.