Medical - go back to your AME - he/she will issue a duplicate.
Logbook - ask PLC what they need - all flying done at a flying club/training organisation will be available from their records. Other flying should be recorded on the aircraft logbook.
For the future use an electronic logbook as well as the paper version - the one I use is available at
jetnet.bidwiz.co.uk
All the best - nightmare scenario
