JUNK fridge? Oh my....LOL

OK, guys - I need some help here.....I just checked my phone and got a missed call from about 2 hours ago from the company that's calling me in for an interview. The woman left a voicemail saying she'd like to get more of my background and ask me some questions so she can pass my info onto some hiring managers.

I TOTALLY FROZE.....And SUCH shame and fear set in.....I do not have a degree, and the idea that people will ask me about my formal education leaves me feeling SO embarrassed and shameful. I have 20 years of experience which I know counts for something...but still. ACK.

I need a push to call her back....help?