My goal here is not to scare those who wish to quit, but to share my story and give hope. And possibly give those late night insomniacs something to read and relate to, like I once did.
I quit smoking cold turkey after smoking everyday once my wife's uncle died of lung cancer.
I had horrible withdrawals at first with sweating, stomach cramps, acid reflux, muscle spasms, mood swings, headaches and hot/cold flashes. At first I thought that I ate bad food. I didn't know weed withdrawal was a thing. The symptoms we're manageable at first and i thought I just caught a bug.
A few weeks later I start to have sleeping problems and everything spiraled from there. I went nearly ten days on 5 hours of sleep. I was so confused and worried. I tried my hardest to sleep but it always evaded me and soon it became the enemy. I dreaded the evenings getting ready for bed. I would leave in the night after trying to sleep, sometimes 3 or 4 a.m., and go to the store and get sleep supplements or teas. Nothing worked. I developed high blood pressure (145/90) and I'm a fit 160 lbs 5'9" male, so it's fair to say it was connected to quiting weed, there is a study on this as well. If you look at me you would never suspect I have high blood pressure (now I know why it's called the silent killer). For months I had a tightness in my chest, I could feel my heart beating and hear it in my ears when I layed down at night. After about 6 months i went on blood pressure meds (ace inhibitors) for about 5 months until I felt my blood pressure stabilize. Itook the lowest dose possible at 5mg. I didn't want to switch one drug for another.
When sleep finally found me I would have intense dreams with vivid colors and sounds. Once I woke it was as if I barely slept at all. I started to grind my teeth at night due to the intensity. I would wake up with horrible jaw pain due to my jaw muscles clenching all night long. I quickly bought a dentist quality mouth guard to counteract this, because the store bought ones made it worse, and my pain went away.
At this point I was losing it. So many things were out of my control I didn't know what to do. I was near my breaking point and all of the sudden,I developed tinnitus (ringing in your ears) in my left ear. It bothered me 24/7 and added to my sleep deprivation immensly.
After about 3 months of annoying my wife with my insanity I began to slowly mellow out. My insomnia lesseneded and I would sleep well for 4-5 nights a week. With the extra sleep I was able to at least act normal once again and hide my crazy. I worked and finished up my last semester of college and miraculously made it through to graduation. At this point it's been nearly 7 months after my quit date and my PAWS have become few and far between. My main problem at this point was my tinnitus and high bloodpressure.
At about 7 months was when I truly started to feel better. The tinnitus was a new normal by that point and my blood pressure was my only issue, which I tried to ingnore. I was beginning to forget I even quit! Life was returning to normal.
11 months after I quit I decided I wanted to stop taking my blood pressure medication. I didnt have any side effects from the medication, but I didn't want any to develop either! I could feel my heartbeat like before, but since it was my last treatable condition i stopped worrying and started accepting my condition, i decided to take it head on. I stopped thinking "I can feel my heart beating -> I'm dieing!!!" And just had passive thoughts like "yup, that's my heart beating, NBD".
So the rest of my journey has just been working and getting healthy once agaain! Now Im a year and 8 months clean from green and couldn't be happier with my decision! No more anxiety, no more sleep issues, and no more high blood pressure! All is good now!

The only thing I would do differently was wean myself from weed. If you smoked everyday like I did for 4-5 years. You'll want to wean yourself off over two months. Cutting your dose in have every other week until you eventually stop. It might seem bad at first with bits of withrawal (that might turn ya off, but it will be much more gradual than if you went cold turkey!
Best of luck yall!