I'm 6 weeks pregnant and had spotting, passed a clot. when i sneeze or move wrong my csection scar hurts, burning sensation. is this normal?

Not normal: You can have bleeding in early pregnancy but you may be starting to have an early misc , the spotting was not worrisome but the clot is, and at this early you should not have any pain from your section scar, please call your OB as you need an ultrasound to check for fetal viability and an exam of the scar and you may need an abdominal us of the scar or other imaging.