Helpppp

I was invited to a career fair that starts in 4 hours but I'm not sure if I should go. I don't have the appropriate professional outfit to wear & I know wearing an appropriate outfit is important & I only have jeans & my shirts aren't really formal. I wanna make the best first impression I can but I don't feel prepared for it outfit wise & I only have time to speak to one of the companies so I don't wanna just talk to one & then leave. Seems unprofessional as well but if I do go I feel like it shows I will do what needs to be done, I'm dedicated & am serious about finding a job.