The correct thing to do is to keep working and contributing and see about entering a dialog with your moderation team on the site. Just flag one of your answers or ask this on your site's meta and your moderation team can set up a private chat room to avoid publicly accusing anyone of improper voting.
From a systematic, site-wide perspective, be assured that the system works better when long term patterns arise and the vote script is there to catch totally over the top behavior or short term misbehavior before the normal tools can be effective. If someone or some group of people consistently down vote one person, it will get flagged for your moderation team whether the time period is short or long.
You want to be open to the possibility that it's not simply bad acting, but do reach out to your specific site's moderation team. In the short term - just keep on participating in the site and engage your team of moderators when something feels really off in your reputation stream.