Rookie mistake.....need help

Welcome to the site. I would humbly suggest that you replace all 10 studs on the left side of the car from Left Hand Thread (LHT) to Right hand Thread (RHT). Don't pound them out with a hammer. That could damage the hub/ drum. Press them out. Does it hurt to have LHT studs and lug nuts on the car? Absolutely not. I just like to have all RHT studs and lug nuts on my car.