Do I need to get a divorce from a secret marriage to remarry?

I was in a relationship and in order to avoid zinnah we decided to get married. I was a girl of 24 years then and during the process of nikkah my guardian or any of my relatives was not present, I was alone. The presiders were all strangers to me. Moreover I did not recite kalma or say qubool hai ... I simply signed a paper. **Is this nikkah valid???** It has been two years since then and eventually the relationship did not last. **Do i need to have talaq to move forward for a marriage????**