Quit smoking marijuana, having common withdrawl symptoms and just need some support+motivation

I've seen other posts, and thought I'd share my story up to date. First off, I'm an 18 year old male, and have been smoking for around 9 months, while the 6 most recent months consisted of smoking every day, especially an hour or so before sleep. I would probably smoke anywhere from 2-4 bowls throughout the day, and loved it. I've never really had any medical problems, and consider myself pretty lucky for that. This past Saturday, it was different. I smoked a much higher strain than I was used to, and smoked a good 6-8 bong tokes. Everything was fine at first, till I felt a lump when swallowing near my adams apple. It kept happening, and it felt a bit harder to breath. I stood up thinking id walk to the kitchen and that it would go away.. Once I got to the kitchen my body FREAKED. It felt like I was having some sort of deadly attack, (Heart Attack, Seizure, etc.) and I was scared for my life. All I could think about was to find my phone to call my mom and tell her I loved her, yet couldn't really control my body. I believe I blacked out while standing up for a second or two, and when i realized how bad it seemed, my instincts told me to go to the freezer and stick my head in it.. This helped me calm a little bit, but my adrenaline was still pumping.. I've researched it, and it seems to be a very normal marijuana induced panic attack. I've never gone through anything like it in my life, and have never really been an anxious person. I finally calmed down more and more, and after 2 hours, I was able to get back up from sitting down and move around a bit. I decided that night I was going to quit smoking, and maybe think the most optimistic and that it was a push I needed to be able to quit. The day after, i took 2-3 hits from a bowl, just to test and see if the panic would come back. While I didn't really get high, I could tell that my body wanted to panic, but it didn't. I've made the ultimate decision to quit cold turkey, and am going on the third day.. Its been ROUGH. I've been going through consistent anxiety, insomnia, lack of appetite, and shortness of breath (which i heard is related to the anxiety.) I haven't had a full meal since Sunday, simply because I'm just not hungry. I did a bunch of research on quitting cannabis, and have learned a good amount of info along the way. I'm currently taking all natural L-Theanine, and Vitamin B12 pills, as I'm trying to get through this on my own, and not depend on another useless drug. The one thing bothering me at the moment, is the shortness of breath. It's hard to describe, but it feels like my breaths are not complete unless it's a really deep breath, and you can feel like the difference. I've been yawning to try and get the sensation, but that doesn't help much. As a result of this deep breathing, my chest is sore, which would make sense.. It seems like im working my lungs more than usual, so being sore would only make sense. While I've seen a bunch of posts saying "It's all in your head" and "There are no Cannabis Withdrawal effects!" I just can't believe it. I've had trouble sleeping the past few nights, and just find myself rolling around in bed, mind racing, and simply not feeling relaxed/comfortable enough to sleep. If I am able to fall asleep, I wake up soon after. After researching for the past few days, it seems like this is all pretty normal, and other people are going through the same stuff. If you have any more suggestions, comments, or even just a post of encouragement, it would honestly mean the world to me. I'm taking this one day at a time, and I KNOW I'll get through it, and that it's just a matter of time. Sorry if this post is a bit long, but i figured if I'm going to make a post, I'm posting all the details :-). If you've made it this far, thank you... and i mean that