Tantrums & Refuses to listen

Hey Mama’s. Recently my LO’s tantrums have gotten out of control. He whines ALL DAY. Refuses to sit down unless he’s in his car seat and is extremely hyperactive. I know this is the age where it tends to happen the most, but this is getting out of control. I’ve tried leveling with him, letting him cry it out, redirecting etc… but none of it seems to work. I’ve also taken away the screen time as well. It can be embarrassing especially when we are out in public. Today he started his first class for KIDSTRONG and he refused to follow instruction. I felt like everyone’s attention was on us. I literally left out of there in tears. I think my last resort is reaching out to his pediatrician so that he can get some type of evaluation. Any other mamas dealing with this?