I was diagnosed with generalized anxiety disorder, clinical depression, and panic disorder when I was 15, after having suffered from these problems ever since I was about 8. So you're preaching to the choir with me. My panic attacks get so bad I feel like I'm going to pass out (and have once and almost have innumerable times); chest pains, shortness of breath, lightheadedness, I can't focus, I shake, my hands sweat. I also suffer from hypochondriasis so I think every little pain or issue is something huge ("I'm definitely having a seizure", "it's a tumor for sure", "I'm deficient in X vitamin/mineral and it's going to seriously hurt me", etc); combine that with emetophobia (a fear of vomiting) and I cannot function.
The only thing that's really ever helped me is escapism. That can entail a lot of things -- I like to find instrumental music on YouTube or watch some of my favorite YouTubers (Alchestbreach, Markiplier, Game Grumps, and some rando channels about music or whatever), and I like going to ambient-mixer, a place where you can find sounds that encapsulate movies or cartoons or video games you enjoy. Video games is another thing that helps distract me. Petting my animals helps, too. Basically, anything that distracts me, I'll do it and see if it stops my panic attacks.
I also cannot do meditation (focusing on my breathing doesn't help). Yoga is nice for flexibility but it doesn't help my panic attacks. Exercise is somewhat helpful but doesn't stop them. Eating healthy is very helpful (if I eat horribly, I feel so much worse) but again doesn't stop them.
This being said, my situation allows me to be home about 99% of the time so that makes it easy for me to come out of it. If I'm out and about and it happens, it makes it 100x worse because I feel like I can't escape. I've had plenty of breakdowns where I have to sit on a shelf in the store or on the curb outside because I feel like I'm going to pass out. I can't even take most anxiety medicines because they make me suicidal or give me the shakes.
I've heard a lot of good things about CBD oil but I've never tried it. Smoking pot is not recommended, it definitely made things worse for me, but as NanusMightyena said, CBD oil is not supposed to get you high. It's supposedly very useful but I don't have first-hand experience. Might be something to look into if that's a viable option.
And I'll end my rant here. If you want to talk more about it, we can DM each other. Dunno how much that would help but I'm here for that if you need it. Good luck.