Yep, meltdowns are SPD related. My older son mostly has them now when his routine changes and transitions. New situations and the unknown cause major anxiety for him. When he was younger, his meltdowns were related to sensory overload, especially sounds and light, sometimes light touch. He's better able to handle the input from his senses, but still needs as much of a routine as possible. The more we're able to prepare him for a change to his routine, the better he's able to handle it. He also has meltdowns if he is having a "clumsy" day (I forget the proper SPD terminology--bumping into everything and falling down a lot), crying "Why do I always get hurt?"

I have meltdowns if I'm around a large group of people too much. It just overwhelms me too much and I can't handle it. I need alone time every day to help keep calmer.

I have the same "laziness" too. Some days it feels like everything is a huge huge effort, very overwhelming to do even the most ordinary of tasks. I get very emotional about it as well.