I wouldnt do anything. They arent responding to you because either they arent interested in you (which is understandable cause 1Ls are useless to firms) or they are waiting to make a decision on giving interviews. They havent lost your application, or at least, most likely they havent lost it.
Just wait it out. If you are getting nervous, apply to secondary markets or do what 98% of the other 1Ls do and apply for government, judicial, or public interest internships so you will have a back up. Be cautious about judicial internships though, because they are time sensitive and once you accept you cannot turn one down, or at least you shouldnt.