Had an oil drip for a couple of months. Finally had time to work on it. Jen I rebuilt the engine the oil pan gasket was shipped flat and folded over. The curves were kind of pinched and not round and it took me forever to get it in place as it kept trying to fold itself back up. Had to use rtv and to hold it still long enough to quick jam the pan up. So I always figured that was the leak, but bought a rear main seal just in case. Popped the pan and sure enough the gasket popped out when tightening.
New rear main, Fel pro gasket and an oil change.
Clearly this gasket was shipped better instead of folded in half
live and learn, when your gasket is folded. Send it back buy a new one