It seems you checked the option not to receive the booking codes via email for privacy reasons. Call LH on their German number +49 69 86 799 799 or some smaller European country from the list here, you should get someone there quicker:

https://www.lufthansa.com/sd/en/supp...ntact/hotlines

Alternatively show up early at the airport, any mismatch between reservation and ticketing can be sorted out there.