Lime will change your pH very slowly so I would not retest before Spring. It also works best when incorporated into the top 2 inches of soil, not just sprinkled on top.
Your pH is low and it takes a lot of lime to raise it one whole point so don't be afraid to apply it.
I would aim for 6.5 - 6.7 as that is optimum for most vegetables.
Take it from someone who has worked in a Chemistry lab for 20 years - DO NOT waste your money on an at home pH meter. They are notoriously unreliable.
In our lab we calibrated ours with standard solutions every 8 hours to assure accuracy.
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