Dentistry question.. can bad teeth make you feel like this..?

can bad teeth (rotten, cavity, ETC) make you feel faint, dizzy alot, or make u sick.? im asking because i have bad teeth for about a year now i do brush but it never really helped lol. yes iknow ur probably thinkin ewww but as a kid i didnt brush i was a very lazy child lol but i started possibly too late so can bad teeth cause those symptoms.? also can bad teeth cause anxiety or depression?