Our sweet boy won’t stop calling me dada

Hello, my son keeps calling me dada. He will point to my husband and say dada. Also my husband will point at me and mama, so that he will know that my name is mama. He used to say mama but when we stopped nursing him, he stopped calling me mama. I don’t know what to do. He will say meme to my grandma but him will say mama. I also think that he thinks it’s funny because he will say mama and I will say “no mama” and he will smile and say dada. I never had this happen before.