I'm really scared of the dentist. So I don't often go to the dentist. My gums have signs of bleeding when I suck on them, and when I brush. Otherwise it's fine. Some of my gums feel pain when I press my tongue against them. I've used somewhat like a dental pick between my teeth cause I've noticed that there are black stuff between them. It's rock hard. Is it cavities? I can't take it out. Thank you and please keep it private. Thanks.