I had a nissen 10 years ago. food still gets stuck when i eat. is this normal?

That procedure can lose efficacy after some years. Consult a specialist in acid reflux surgery at a university hospital near you for evaluation and advice about your current status & treatment options.

Although this is not normal, it is certainly not unusual after a Nissen. If it persists, I would see a gastroenterologist, who may be able to do a small dilatation to allow you to swallow better. Good luck.