If your CYA is 30, FC of 5 is fine. (Read the Best Guess Chlorine Chart in my signature below.)

I kinda doubt that your TC was 0 and 0.5. I suspect that you mean those were your CC levels? (FC + CC = TC)

Did you add any additional CYA after you last tested it? If not, then there is no reason to waste the reagent testing it again.

Glad the pool survived and hope your vacation was a good one!