An MD has lifelong financial stability and the chance to do residency and earn even more. You completely burned the bridge when, after just a year, you could've done tech and preserved the bridge, no?
"preserving the bridge" only makes sense to an outside observer. It may never be a practical option for the OP. In fact, it may be something that may taint OP's identity for the future in that he/she may always be stereotyped as a doctor. It'll be contested every time he meets someone new. It's nothing short of an identity crisis. It's the loss of freedom to do what he wants.
People like this usually try to live life in accordance with self-defined principles rather than those defined by the social structure. They think different.
Most people on HN will say, nah, don't do it! I disagree, if you can finish, it is unique and will pay dividends later. If you don't finish, you are starting from zero. If you can finish, you should.
I'm about to take a year off medical school to explore the startup/design world. I'm doing it to finally pursue my real passion and interest, to take some time to contemplate about whether being a doctor is something I want to commit to (probably not), to get into shape, etc. Seems like a reasonable decision, but to my dad and family, I will be considered an immense failure. Being a Doctor is a disgustingly inflated status symbol in my community, and deciding not to be one is about the worst thing you can do other than murdering someone.
I won't be getting any support, emotional or financial, and worse is that I'll be consistently criticized and told that I'm making a stupid, selfish decision. It may very well be stupid, but I won't find out if I don't actually do it. It'll be tough, but more than worth it.
You're incredibly, incredibly lucky, OP, to have an understanding and supportive parent. There are many out there who'll never get to make the leap that you've made because of familial pressures and criticisms. Best of luck!
Edit: If any of you have an interesting startup opportunity (particularly in health), email is in my profile!