I was in contact with someone who is now covid positive.they visited the store in friday and had a test the next day. i wore my mask however i did touch the same products, i can't remember how long i stood next to them. what do i do?

Are you vaccinated? If your second dose was more than 2 weeks ago then you should have enough immunity. I am sure your mask was properly worn covering mouth and nose. You must washed your hands . Then keep wearing mask in presence of either unknown vaccinated or known unvaccinated. If you start getting symptoms of COVID-19, get tested. Get vaccine right away if not yet. Better late than never!!!