We may have discovered why Alex was being extra destructive and it wasn't just about the upcoming summer transition or family stress.
He had a loose tooth.
Which is now in a box.
Alex has historically acted out when his teeth were loose. With his oral sensitivities, the sensation must just drive him crazy. Those same sensitivities also make it almost impossible to check what's going on. I honestly thought all his baby teeth were gone (and I'm almost certain the dentist agreed with me) but apparently there was one left.
He's been much calmer today since it came out.
Fingers crossed that this was the tipping point.