2 year old won’t talk

My 2 year old is only saying a handful of words but not super clear. He refuses to say mama even though he knows how. I tricked him into saying it by making a mmmmmmm sounds and aaa right after knowing he would copy me because he likes to copy sounds and he did and I guess I got a little too excited and spooked him and now he gets mad every time I say say mama! Idk what to do! I got the number for early intervention but thought I would come here for advice before I called. He also said all don’t when he was finished eating for the first time and he a said it twice while doing the sign for it and I said good job but didn’t make a big deal about it since I didn’t want to scare him again and now he refuses to say that too even though I ask him after every meal if he’s all done. I’m not sure if he’s going through regression or he’s refusing to talk but has anyone else gone through this with their kid? He’s so smart and know all his animals can match colors and shapes and knows his body parts all by pointing when I ask and he talks gibberish all day long. He turned two in July and

Definitely should be saying mama right now especially since he can say yogurt! It’s just a little frustrating and I’m sure it’s frustrating for him as well as I can’t understand what he wants. Any advice will help and I still do plan on calling early intervention if he’s not saying more words by the end of the month