Soon after azithromycin was released, it was shown that taking a Z-pack, consisting of 500 mg on day one, followed by several days of 250 mg per day was slightly less effective than a
single 1.0 gram
dose. You took considerably more, The odds are very high that this sort of dosing is just as effective as a single 1.0 gram dose.
If you were symptomatic and your symptoms co away, I would not worry further. Similarly, if your infection was asymptomatic, I would not worry further either.