My child is acting up

Love

Yes the title is bizarre but my 2 year old has been acting out of line so bad lately. Idk what to do anymore. His dad doesn’t help and his sister who is 10 tries her best to calm him down because when he’s mad he refuses to let me touch him or talk to him. When he gets mad and angry he goes to the next level. I try not to acknowledge his bad behavior because I heard if you give it attention they will keep on. So we were at the store the other day and he runs to the toys, I tell him no and grab him because he refused to leave the section. I’m walking with him and he keeps pushing me to go back I say stop and push his hand off of me and not with force! He throws his self on the floor doing a whole cart wheel and everything like if I pushed him!! I couldn’t believe what he just did. He makes me so nervous taking him anywhere and causing a seen places when he doesn’t get what he wants. And yes he usually does get what he wants but I’m trying to stop it since I have another baby on the way and that’s where I went wrong. Now I’m trying to stop it and it’s been horrible. I’m scared someone will see and thing different and call cps. How do other parents handle a situation like this?