Slight problem during oil change, what to do next?

[911monty]

Pulling the pan will also tell you nothing. The damage if any will be localized and with no oil flow from lack of oil, to move debris, will still be at the point of origin.
At this point the primary concern IMO will be the chain tensioners. With lack of oil pressure they are likely now retracted further than normal. If your cam timing hasn't already slipped, it could slip on restart when there is resistance to rotation from cylinder pressure.
With the skills demonstrated previously I'd recommend a professional look at your engine. BUT in this case the potential damage if any is certainly catastrophic, (main and rod bearings, wrist pins and valves from slipped timing, the Other end of the IMSB ?!?) and I don't see an engine inspection teardown as likely, Then pull the spark plugs, fill with oil and crank the starter for a good minute or two to get oil back where it should be. Hopefully pumping up the tensioners. Reinstall spark plugs, liberally apply Maui Wowee, cross your fingers and hope for the best. Could get lucky.