No, you are not considered niddah.

Bleeding from polyps on the outer cervix is not considered uterine and therefore does not make a woman niddah.

The procedure to remove the polyps typically causes bleeding, so you may attribute the bleeding to the procedure. Since the procedure does not enter the uterus, it raises no other halachic concern about niddah.

Please write back with any further questions.

Refuah sheleimah!