hiya new this but need some advice been in tears. i have a 3 year old son who is usually well…

hiya new this but need some advice been in tears. i have a 3 year old son who is usually well behaved and is like any typical 3 year old. i am 11 weeks and 2days with my second. we havent told my son we are expecting as we want to wait after my scan on friday. the past few weeks his behaviour has been horrendous hitting and kicking i am not sure if its because he can sense i am pregnant and something is different or he is just going through a behaviour stage. sorry for ranting on xx