Since your pool has had water in it for several days now with no real cl level to speak of, I'd probably throw in a 3-qt. jug this evening. Wait a couple of hours and test and see what that does for you. It will probably take you up to about 3.5. Then, I'd suggest testing it early in the morning. If you haven't lost more than 1pm of chlorine overnight, then I'd say you lucked out and despite the delay in chlorinating and filtering, you escaped something starting to grow. If you do lose more than that overnight, I'd shock the pool. Don't want to start off a new pool with icky stuff growing in there! Better take care of it right off the bat.

Keep us posted how it is going. And, have fun swimming this evening. You are gonna swim, right??

(In your pool, each quart of 6% bleach will raise the cl by about 1.2.)