By MATTHEW PERRONE, AP Health Writer WASHINGTON (AP) — Millions more home tests for COVID-19 are hitting store shelves, but will there be enough for Americans hoping to screen themselves before holiday gatherings? Gone are last year’s long lines to get tested, thanks to nearly a year of vaccinations, increased testing supplies and quicker options. But with many Americans unvaccinated and reports of infections among those who’ve gotten the shots, some are looking to home tests for an extra layer of protection ahead of this year’s festivities. Janis Alpine of Seattle is getting together with seven relatives for Thanksgiving, including her 97-year-old father. While everyone is vaccinated, she plans to…