Dealing with Overstimulation at Work

I work at a dog daycare and with the holidays we've been seeing a lot more pups. With the increase in population, it's gotten significantly louder than it usually is and I've always struggled with getting overwhelmed/overstimulated in areas with loud, chaotic noise. My PCP said it's likely related to anxiety and has prescribed an as-needed medication, but since I use PillPack it won't be delivered for a few weeks. Since I'm the people person up front, ear plugs or similar sound dampening devices aren't an option, so I'm wondering what else I might be able to do to help with the irritability that comes when I'm overstimulated until I get my new med