I don’t know what is wrong with my gums

A few weeks ago (maybe 2) I noticed a swollen bump at the back of my top two front teeth. Since then I’ve been rinsing my mouth with warm salt water to see if it goes down and it has slightly i think? But I’ve now just noticed when cleaning my teeth that the gums in my front teeth are loose/flappy. I really don’t know what to do because I have an appointment with the dentist and orthodontics in 6 days and I do clean my teeth in the morning and before bed, sometimes only once a day but I do clean them. Please help😭