If you have been experiencing intense back pain for about 7 days, it may be due to stress. To help relieve the pain, you can try applying heat for 10 minutes three times a day or taking Tylenol as needed. If after two weeks of self-treatment you still don't feel any improvement or if your symptoms worsen, it would be best to consult a doctor or a physiotherapist for further evaluation. It's important to continue with your daily activities while listening to your body and pain limits. Remember to always consult a pharmacist before combining medications like Advil with other drugs or health conditions.