Possible autism?

My 22 month old son doesn’t speak, he babbles, tries to say more, kind of says mama and dada but that’s about it. He responds to his name, used about 10 different signs and we’re teaching him more, very well behaved, sweet but very timid and scared of loud noises and strange men. Really my only concern is his speech - an almost two year old not talking seems like everyone assumes autism. Could it be something else? Could it just be a speech delay? On waitlist for therapy (in Canada).