Am I a goy?

Hello.

I am in a strange and, in my opinion, unique scenario.

I am roughly 75% Ashkenazi Jewish. Three of my four grandparents were Ashkenazi Jewish (nearly fully). In fact, I am even a Cohen (did the gene test). I was raised Reform Jewish, Bar Mitzvah’d, and everything

However, rabbinical literature would say I am not Jewish. My maternal grandmother was not Jewish, the only one.

I understand that Reform Judaism is very lenient on who is a Jew and who isn’t, but I want to know if I have a covenant with Hashem, and whether I am part of the chosen people.

Thanks, and shalom alaychem