Autism or ocd

Hi everyone I would just like to ask if about ocd my son has asd but I feel he may also have ocd each time I have mentioned this to my doctor he has said it's  his autism now he is 18 and has  got I lot of things going on like getting with draw from college in March finding change from  2016 his ocd has took over he is now been referred for help I would just like to ask if you have been through this anyone thank you .