When my tattoo was infected, every bit of the color fell out. It was months before it could be touched up. We waited a few weeks and tried, and the needle just went straight through the flesh. It was bizarre. Just give it a few months and with a touchup, it will be good as new.
Were you wearing shoes while it healed? I had my feet tattooed (much more heavily than yours) in the winter, but I still rocked flip flops until they healed. Might try that, even if your feet get cold. Or maybe wait until summer to get it touched up.