Really appreciate your concern as a patient!
Yes, Long term braces without regular check ups will lead to undesired effects to your teeth.
But it also depends on what type of braces you have been fixed with and how well you are maintaining it.
For eg: there are braces system where the check ups should be done at least once in every 4-6 weeks and for some it can delayed even up to 8-12 weeks.
Whereas wearing braces without check up will sometimes lead to undesired effects in the teeth position, especially if you feel that any part of your braces is loose and broken, then you should have a check up immediately.
Next Steps
Try to get an appointment with your orthodontist as early as possible.
Health Tips
Maintenance is key.