For autism. Tell me what can i do. pls.

I completely confuse.because my child age 5 yrs n he is not speak any words.but he go to sachool writing A to Z,And 1to20,he know everything.but he is not play his age child too much..so I visit dr,n reporting all.after reaport dr,said to me ur child is on the border of autism pls some therapy to him.n u not go gor therapy so after 1 yrs ur child totally mental of brain..after I visit 2 more dr.but his opinini is diffrent other dr,show her reaport n said to me it's not autism child ..his not speak so go for only speak therapy..n he also said autism not a move good to bad..so really I confuse n don't know what can I do.I m seriously very tired n every time thinking of my child..so pls tell me what can I do..pls..