Feeling suicidal

Hello I am starting to have thoughts of suicide as unfortunately I feel that I cannot cope with life any longer as nobody seems to listen or understand when I do not like change as I always like everything to be the same, who I am and what I am like as a person and also when I still need a lot of help as an adult as I suffer from severe anxiety and mental health issues too as well as autism. I just do not know what to do anymore!!!!