Honestly being 16 is just kinda like that, especially for folks who aren't cishet. I mean, at that age not only are you learning a whole bunch of new shit, but you're also developing physically a lot- Quite literally, you're changing, because your brain is growing and hormones are starting to do different shit and all that. So like, it's a lot to take in. Don't rush it. Taking the time to think about things is good, but don't make yourself think it's some sort of life or death thing where you have to decide how you identify and what you want and who you are RIGHT NOW. You've got all the time in the world, you'll probably start to feel more settled within the next few years.
I would definitely talk to someone about the panic attacks and hallucinations and such. Hallucinations in particular are NOT a normal part of growing up, so it's probably a good idea to have that looked into, especially if it happens again.