Please use this useful chart to determine your race according to the Nuremberg laws:

http://skepticism-images.s3-website-us-east-1.amazonaws.com/images/jreviews/Nurembergracechart.jpg

If you had one Jewish parent then you were likely a Jew but more importantly your mother was definitely a Jew under the laws. You would at least be a Mischling (mixed race) and eligible for citizenship, provided you were born before 17 September 1935. Be born after that and you're a Jew with no citizenship.

TL;DR: you are most likely considered a Jew under the Nazi laws.

If you were a Catholic born "pure" German and converted to the religion of Judaism, how would you fit into the Nazi's ideological framework?