Hi brother! I know fear and paranoia more than I've given myself a chance to know myself. I don't have the keys to a cure but I imagine if there is one it's inside of you. Sometimes things like pharmaceuticals can help us reach a place where we can see the thoughts and their roots more clearly.
Other times a psychedelic experience can help unless one gets locked up exploring the roots of these things(happens to me sometimes). I've found cannabis to also not necesarily aid panic. For some people it just does the opposite, everyone's different I guess.
For me the most progress I made was either on ayahuasca or mushrooms, but I no longer shamefully admit that anti-psychotics have been pivotal in my over-all recovery. I however am classified as an acute paranoid schizophrenic(high functioning blah blah blah). So my case is likely different. Here's what I have been learning though, and this should be applicable to anyone struggling! I'll try to lay out what I'm doing.
1)Find a way to reach a clear state of mind(for me it took antipsychotics and avoiding cannabis as well as psychedelics for some time 5 months or so now). This is really important, meditation can temporarily bring you there but you need a means to have some lucidity on a daily or frequent basis(at least I did). This might mean changing your schedule a bit or organizing things better, or whatever. This is about setting the
Pace.
2) Find a means to love yourself unconditionally(takes time but it can start with loving things around you). Might sound like hippy stuff but honestly its so important. It's too easy to be too harsh on oneself and give up in a process like this. Sometimes I slip but hell that's life and I cheesely love myself for it

!
3) Mild exposure to the things that freak you out. I know its not easy and your brain will make up a million reasons to avoid certain stimuli but you know encounter the issues from time to time.
4) Awareness. Awareness. Awareness. Don't roll with the punches of your fear. Start by 'watching' it. Catalogue the thoughts that come up when the fear comes. Try and think about their roots. See which side(s) of yourself you like more and which will allow you to grow the most. Growth is often painful but it gets easier(think baby teeth). This is all about learning ourselves and the power of
Choice. Finding where we can learn new patterns by first learning our current ones.
5) Don't revert. Keep up with yourself. If you make progress it's okay to fall backwards a bit but keep at it and don't get discouraged. You've got a life time to live and everything you experience is acceptable! It's happening it's okay, it's acceptable, it's fine. It may be scary but it's okay there's a tomorrow to work towards and in 20 minutes your fear will subside a bit and you can move forward. It's always temporary and okay

.
6) Find ways to manage stress. If it can't be managed yet at least be aware of when you are stressed out. Simply knowing it can really help guide the flow of thoughts and which ones to pick and choose from and which aren't in my interest. Again setting the
Pace.
7) The real core to this also lies in
Faith. Some people find jesus or buddha or commune with the dead or whatever! What I mean is balancing out the rational calculating every possibility side of the brain, and finding the part of the brain that walks, drives, talks, pees, poops, and breaths without even contemplating. We can find faith in ourselves to operate in a way we hope too. We can find faith that the world is comprised of people just like us figuring it all out. We can find faith that things do get better. We can have
Faith!
I'd like to add that this is what I'm doing and it seems to be working. It's a work in progress but it does get better. Some things still make me faint and some things still trigger delusions and at times hallucinations/visions, but its so much more manageable now.
The words I made bold are some of the most powerful things I think we have in our human experience. Call them tools or call them properties of existence. I'm sorry if this is a bit scatter brained hehehe but I hope theres some stuff in here that can help someone.