The first day of your period was on nov 1 --unprotected sex pull out nov 11 -- plan b nov 15 -- brown and red discharge with clots nov 20 - 26 Dec 3-5 spotting again Neg test could you be pregnant?

I doubt it. When you miscarry, the closts have a tiny white center. Most women don't ovulate until 12 days after their period. Plus plan B is very effective (so they say) in preventing unwanted pregnancy, but note, to them pregnancy doesn't begin at fertilization, only when the egg goes inside the uterus. So if you believe that pregnancy begins at fertilization, plan B may have ended your pregnancy. Hope this helps.