Unknown error 0xE8000084/iPhone not showing up in itunes

I think I have had a similar issue to this a while ago, but now I'm fed up with it. Trying to connect my device to my computer results in an "unknown" error in iTunes, with varying hex codes, and after trying many different possible solutions from the community, I guess now iTunes doesn't even want to acknowledge my device. From here, I've tried using other USB ports, reinstalling iTunes, restarting both devices, and so on. I've got 3 new albums to try to sync and I've been dealing with this stuff for the past week or two. I just need help! 😟