Does anyone here have an autistic child?

if so i need your help.. i have a 3 year old that i have recorded having meltdowns they r pretty bad and i wanted to show someone who has experience . i need to know if these tantrums are normal or not. because they seem pretty extreme to me... i am working on getting a good referral to see if he has something but it might take a little bit and i just want some impute .. thanks..