So, I'm curious.

What do you think happens in the infinite loop that "runs you" moment to moment? Passing the same instance of consciousness to itself, over and over?

Consciousness isn't an instance. It isn't static, it's a constantly self-modifying waveform that remembers bits about its former self from moment to moment.

You can upload it without destroying the original if you can find a way for it to meaningfully interact with processing architecture and media that are digital in nature; and if you can do that without shutting you off. Here's the kinky part: We can already do this. You can make a device that takes a brain signal and stimulates a remote device; and you can stimulate a brain with a digital signal. Set it up for feedback in a manner similar to the ongoing continuous feedback of our neural structures and you have now extended yourself into a digital device in a meaningful way.

Then you just keep adding to that architecture gradually, and gradually peeling away redundant bits of the original brain hardware, until most or all of you is being kept alive in the digital device instead of the meat body. To you, it's continuous and it's still you on the other end. Tada, consciousness uploaded.

What if every part of my body is replaced by computer part continously. At what point do I lose my consciousness?

I think this question is hard to answer because not everyone agrees what consciousness even is.