Hi this is a classical example where we need to identify and rule out all possible causes. As you rightly mentioned this can be psychological or physical in nature and also other aspects needs to be ruled out.
Do not take over the counter meds without proper guidance. And one single tablet alone won't do magic.
Next Steps
Please consult for a proper evaluation and management plan
Health Tips
Exercises and relaxation techniques can help. Stay calm and do not panic. This can be successfully treated in 8-10 weeks with proper medication and guidance.