I don't know what I have done...

So I'm 28 I'm no spring chicken anymore...i don't get out much as I have a 1 year old child. Been seeing this guy for a while now and all of a sudden over the last 5 days he's stopped texting stopped calling me on his breaks at work and I've asked him if everything is ok and he's just ignored the question 😢 i can't help thinking he has gone off me or something. He's so unconversational it's like trying to text a tree... Ive allowed myself to fall for this guy. Let all barriers down. And I've been in this position before and it didn't end well.... What do I do? I don't want to leave him cause its highly possible I'm over thinking this. But then again why stop calling and stuff? And why not just tell me instead of leaving me guessing. He knows Im wondering if something is up as I text him last night and asked...now 12:30 pm the next day and all I've had is a message to do with driving lessons.