Hi there, ive had a hole in my tooth for like 4 months. I just kind of ignored it as I havent really got the funds to see a dentist however over the last 2 weeks its got vert painful and i feel shooting pains that go throughout my hole face/head/neck. I also have an ulcer thats been there for 6 weeks which im currently seeking doctors hp for. Im suffering from really bad brainfog. Could this be the cause? I put a pic of my tooth below. Btw i havent been to a dentist in about 7 years.