Am I considered a first-author?

I had a question on whether or not I am the first-author of my research poster. This was for an undergraduate research forum at my state university. The conference was supposed to be in-person, however, it ended up going online. Anyways, the poster is online for anyone to see. The current author name is listed as follows: graduate student^1, me^2, and PI^3 However, I've been thinking and I think it should have been me^1, graduate student^2, and PI^3. I need help figuring out whether or... Am I considered a first-author?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Pre-Medical - MD Source Type: forums