It has been 5 days since my stomach hurts. I started the ring 2 months ago, I removed it yesterday thinking it was causing the pain, but I still have pain.

It could be possible that the stomach pain is related to menstruation, especially if you are experiencing cramps behind the navel. It's important to monitor any changes in symptoms and consult a doctor if the pain persists or worsens. Stress can also be a factor in abdominal cramps. If the pain continues for another week, it may be a good idea to seek medical advice.