Thank you for your question. Adult teeth are typically larger in size than baby teeth. when they come in, the jaw is not yet grown to it's full potential which leads to it feeling like 'a mouth full of teeth'. as the jaw grows, this usually takes care of itself. but without an xray I cannot be sure if this is the situation in your case. please visit a dentist who can assess the situation clinically and radiographically and provide you with the best diagnoses. hope this is helpful.