Hello.
1) It could be because of erupting wisdom tooth
2)Wisdom teeth pain is on and off it comes, disappear and reappear.
3)Bleeding is due to Infection or food lodgement maintain good oral hygiene in that area (rinsing after each meal and after snacking, warm salt water gargle)
3)I appreciate that you have quit.
Next Steps
Kindly visit nearby dental surgeon for physical examination evaluation and treatment plan
Health Tips
Maintain good oral hygiene and get physically examined