My littlin started just recently at being quite naughty, Hes never really been stroppy or anything like that, it seemed to happen after I had my little girl, is he going through the terrible twos or is he wanting all the attention back on him

? All I seem to be doing is telling him off, hes still a lil young to explain things to and I am worn out with it all, my partner says I have changed soo much, Should I be worried

?