Dear Practo User,
It looks like you are suffering from Bruxism. It involves clenching and grinding of teeth. As you said you are stressed, so kindly try to remove stress causing factors from your life.
Next Steps
You should visit a nearby dentist as soon as possible. A Night Guard is advised. For further query you can always ask a private/direct question. Regards Dr Ankit Jain, Arham Dental Care