I have a child turning 3 in March. He has about 40 words he uses all the time and 5 sentences like where did he go mom. what's that, please mum, I don't know and no juice

He understands every request like go pick up your pants they are in the bathroom
He knows all his colours and body parts or food by me asking which are which and he will point. I try to ask him to repeat words and he gets mad at me.
In the last 6 months we have had a new baby and my husband has relocated to a new province and I am in a custody battle with my ex so we are living away from him at my parents, so lots of change. What do I do and is there anything wrong, I am thinking about contacting a speech pathologist

Do you have any advice,ot would be appreciated