no worries, they're young enough to recover. take a knife or similar and slice along the inside perimeter of your cup to loosen the dirt. place the cup on its side and use the knife along the upper inside to pry out the dirt ball as intact as you can. once you have the dirt ball free then slowly pull apart the dirt ball with one hand near each plant. repot each alone and cover the stems of the plants with an extra inch or two of dirt and you should be ready to go.