Should you say you have Asperger's/ASD if undiagnosed?

I noticed when signing up for a evening class I had the option of choosing Asperger's from a list when asked if I have a disability, and also Autism Spectrum Disorder when asked if I have a learning difficulty. I am wondering whether I should say I have either of these whilst undiagnosed. My doctor thinks I have Asperger's and has referred me for an assessment. I also scored very highly on tests.