Girls, share advice!!!! My son is one year and four months old, he had…

Girls, share advice!!!! My son is one year and four months old, he had a scrotal hernia removed at one year and three months, after the hospital I don't recognize him anymore!! In the hospital he went through huge stress, anesthesia, surgery and two injections per day (5 days). After the hospital he became withdrawn. He doesn't play peek-a-boo, he doesn't always respond to his name (although before the hospital he always called him, he came), he doesn't show his eyes, ears etc., he doesn't talk (only "tata"), he doesn't nod yes or no, he doesn't repeat anything and doesn't perform any requests. He doesn't like