Cartilage piercing help and telling parents?

So…I pierced my cartilage a week ago just above my first. Yeah, stupid idea I know but I got all my others with a gun so I thought why not pierce it myself. Well there is no problems so far…it’s healing fine. My questions are…can I pierce above it (so I have my first healed one, the second one that is healing and then another one above it) or should I wait till the first one heals? Is that a bad idea? And can I pierce my cartilage on the other ear or will it be impossible to sleep!? I can sleep on my healing one with a bit of difficult but not much. Then after those question is a bigger one. My parents don’t know about my healing cartilage piercing…I know! Another dumb move on my part but too late now…I was wondering if I should tell them? I can’t hide it forever (keep in mind I’m not an adult, I live under their roof and I promised no more piercings), I think they’re is a chance they know about it but for some reason are waiting to get mad (I don’t know!!) and I feel HORRIBLE!! This is the worse thing I’ve done in my life so far (I’m a bit of a goody-good shoes or w/e)!! I promised them and went behind their backs, tonight we had this talk about them trusting me (I brought a subject up to talk about this) and I felt so bad I was about to tell them then and there but decided to make sure what I want/should do…Is it true that you won’t get in too as much trouble if you tell them yourself??? Why?