Need Help With my D800 Please

I do not normally post on here, just read and learn =) However, I'm having an issue with my G2 for AT&T. I have a Nexus 6 and cracked the screen, I was trying to get my G2 up and running until my replacement gets in. I had CyanogenMod on it but did not turn on the phone in quite a while. Got an update, did that and nothing was working. Could not even get Google Play services working at all. Flashed a random ROM to see if it would help and now I cannot even get into recovery. The phone operates fine, however if I try to do the power button + volume down button to reset the phone, I get to the point where I hit the power button twice and the phone resets. I've selected rebooting into recover a hundred times with no luck, it will get to recovery and before I can hit anything....reboot. Last night I tried to go back to stock with LG Flash Tool (after downloading everything I need to download) but keep getting Fail after unplugging my phone and plugging it back in download mode. I know long paragraphs are not well liked here but i feel i'm sort of o ut of options other than reaching out to you awesome people! Just wanna go back to stock at this point. I've never had this issue where I cannot even get into recovery but the phone work perfectly fine! grrrrrr