A.C.
Hi ~
what you are describing sounds like possible seizures. I would talk to your pediatrician right away about what your son is doing.
toe walking can be normal as long as the child goes in and out of the position. continuous toe walking, toe walking across the room, etc is not normal. more than typical toe walking can be sign of sensory processing difficulties or tight leg muscles. But again toe walking in and of itself does not mean autism or sensory processing - there are many other reasons why a child toe walks. If toe walking continues for a while/increases you may want to consider a physical therapy evaluation.
Good luck! Aurora