abckidsmom has my experience down
I was an EMT-A (old version EMT-B) and went to BSN program. My EMT class was at a tech school so nothing from that was transferable. When I mentioned my experience, and even taught my instructors how to use small O2 cylinders on code carts, I was told by one, in a friendly aside, to take that experience and put it in a drawer; different mindset, different ethics, etc. I would suggest seeing if the course(s) you took have any transferable credits and do that, then just go to school. Going "backwards", RN to EMT B or EMT-P, is hard too. Not backwards, more like sideways.
PS: Go for the Baccalaureate, especially if you ever have inclination to joining the military or nurse hiring gets tight again, as it periodically does. If you take the ADN or a certificate, you will not "go back to school later".