need help with teeth discolouration

[Abdullahm06]

there is dark discolouration in between my top two middle teeth:

i just randomly noticed it after waking up like 9 months ago and ive been pretty insecure about smiling since then and when me and my ex were talking shit about each other jokingly she said it looks like theres always something stuck in my teeth which made me feel a bit shit tbh

so does anyone know the cause and solution to this?

 

[Abdullahm06]

bumpy bumpy

 

[Abdullahm06]

useless motherfuckers i will just ask chadgpt