I may have screwed up ....more than once

Been there, done that. I prelubed my 273, primed it and had oil everywhere it was needed and fired the thing up. I stared at the oil light on the dash for over a minute before it went out. It was stupid on my part and scary now that I think about it but I knew there was plenty of oil everywhere. You should be good. You had oil pressure and then running the drill in reverse it pumped it back out. Just prelube it again and rock on.