Is this a tooth??? πŸ€·πŸ½β€β™€οΈπŸ€·πŸ½β€β™€οΈπŸ€·πŸ½β€β™€οΈ

I’m a first time mommy and I need help. My daughter is 5 months going to 6 months next week on the 16th. I really know if this a tooth or what. She’s a breastfeed baby 🀱🏽. Can someone please tell what this could be?