I can only echo what
@the esk says mate. Take it from me you aren't going to have you're driving licence being taken away , so forget about that. As a sufferer of over ten years, never once has my driving licence been mentioned and I,ve been through the system. If you're parents haven't suffered themself, they wont understand as they've never experienced it. However the fact that you've told them means that they're there for you and that's going to be important with any treatment you get. Once you've been to your GP you'll walk out and feel like a massive weight has been lifted.
I have been exactly where you are now. An example I,ll use is that when I walked down the road, I didn't see the trees or hear the birds, I saw then rubbish in the gutter and the dog crap on the pavement . In short you stop seeing or feeling anything positive at all. That's depression , there's stuff going on in you're brain that's not right. It can be fixed, but there's no quick fix.
You've taken a massive step in the right direction by telling your parents, the next one is going to your GP. Tell your GP everything that you've posted on here , trust me he / she will want to know . The more info they're have the more they can help. Theres no shame in being ill mate. Try and think of it as an illness just like any other illness, because that's what it is.
Keep posting as theres loads on here to support you.
Ps - have a look at this online community - THE MENTAL HEALTH FORUM.
NHS run, you have to join to post, but you'll find a lot of help and support on there too.