New to this would appreciate feedback!

my 5 year old has been seen by A paediatrician and is currently awaiting and adhd and autism assessment!

charlie has recently started school and things have been going great at one point I thought wow it's a phase he's been brilliant and this weekend came he managed to get a cold and a cough so was feeling a little under the weather!

did my usual food shopping and out of nowhere we got a high pitched noise that he thought was very funny as were walking around both my children were in the trolley and I got punched in the tummy several times he tried to pull my scarf which was strangling me he was kicking and shouting this got so bad I had to go and wait in the car with him while my partner finished off and it continued kicking Windows bouncing around the car all this was still very funny!

when we get home he is destructive throws things is very loud can sometimes have a baby tone to his voice he will spit head butt me and the floor or wall bites himself in frustration he cannot seem to process his emotions!

For A 5 year old he enjoys things are different to other 5 year olds I would say he is a little obsessed with technology he enjoys maps and numbers and asks a lot about the time and what time were doing things! 

He has been good at school but his behaviour has started in public so I'm slightly concerned it could start in school to! I just wanted thoughts on what you have read and if there's anything I can do until the assessment there is a waiting list so unsure of how long I will be waiting i appreciate you reading thanks!