Parenting help

I honestly feel like I’m at a complete loss, and the last time I came on here asking for help I received hate comments. I just need advice.

My two year old is an actual nightmare. He is only bearable about 10% of the time. He is a constant tantrum. He is non stop throwing himself onto the ground, screaming, crying, and just falling apart. He’s not in pain and we’ve had him evaluated by the doctor multiple times. We have stopped going into public because of how he acts. I’m worried every single day that The police are going to knock on my door because all he does is scream and cry. I feel like I’ve tried everything. And it’s not one specific thing that sets him off, everything sets him off. He will be totally happy and sweet one moment and then just start screaming. And by screaming, I mean a angry grunt scream as loud as he can. I haven’t been able to go anywhere in atleast two months. I hate dealing with this every single day living in fear of someone hearing him and thinking he’s being abused. And frankly I’m just tired of it myself. It’s driving a wedge in my husband and I’s relationship as we’re overly stressed until he goes to bed. We can’t even simply work (we work from home) because he’s at 100% all day. My husband broke down crying today because of this. I don’t know how to stop the non stop 24/7 tantrum. Please give me any advice you have.