Even with your previous bachelors degree, HR personnel will still consider you an RN with an associates degree. Due to the sluggish economy and the mass production of so many new nurses in recent years, many hospital systems are either preferring or outright demanding that new grad applicants be educated at the BSN degree level to be eligible for jobs within their companies.
The BSN degree is the new weed-out tool because it effectively cuts the applicant pool in half, which saves HR significant time and effort.
However, if your heart is not dead set on hospital employment, you should be able to secure employment in home health, clinics, hospice, nursing homes, LTAC, prisons, and other areas outside the acute care hospital. Also, if you are willing to relocate to areas where RNs with associate degrees are still hired in hospitals, you should have no problems.