Where's my mojo ???!!

Okay heres bit of a bizarre blip but these are my new running trainers. The only trouble is I've lost my mojo to run !!! Not sure if I ever had it but have entered my first 10k run in June only ever done 5k before so need my mojo back pretty sharpish. Today was supposed to be my running day an I made every excuse in my head not to go an it worked.
Need help or I will never complete this race !!!!