Am I overreacting?

So I got engaged a few months ago and naturally as women do, i was talking about the wedding with my nan and mum and we got on the subject of bridesmaids. I am having two maid of honours, my best friend and my sister in law. So I told my mum and Nan who I was having as maid of honours in which my Nan turned round and said I couldn’t have best friend as maid of honour as she’s too pretty implying that she’ll look much better than me and I’ll be overlooked. My best friend is beautiful and she’s my best friend I couldn’t get married without her! I know it’s not about looks when I get married but am I wrong at feeling a bit hurt by what my Nan said.. I wouldn’t change having her as my maid of honour I’m more cross with my nan than anything for saying that and now I’m paranoid I’m going to look terrible at my wedding and feeling really ugly. Do I tell my nan she hurt my feelings? Do I just take it on the chin? It’s really bothering me and I just think of it randomly and it upsets me.