am i too old to rush as a junior?

title. i didn't rush as a freshman or soph and i really want to do so now, but i'm scared that i won't end up being invited back to any houses because of my age (i'm 20 and will be 21 by the time formal recruitment starts). i don't know many people on campus due to having a bad freshman experience and im worried this will hurt my chances too. should i save myself the embarrassment and not try to rush?