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I'll give a bit of contrary advice/experience. I (37 yo male) had many of the same symptoms (and to a lesser extent still do, which I'll explain). Anyway, I "quit" coffee twice (cold turkey, month of Dec 2017 and Dec 2018) hoping it would be the fix for these, but honestly besides the first week of headaches didn't notice much difference. It was not the "miracle cure" I was hoping it would be. And I still wanted to have a 'hot drink' at hand all the time so re-filled mug with hot-water from the office coffee pot constantly each AM so it was just as compulsive.

You should probably still try and it may be great!! ...but for OPs list of symptoms you almost certainly need to do other things too. Especially increase water, regularly moderate exercise/fresh air, etc. So what did "help" for me?:

• Intermittent fasting (16:8, where you do 16 hrs fasting or 8pm-noon no food and 8-hr eating (noon-8 pm), with 24-hr on some weekends...you may know about this but this FAQ is v helpful, it is simple https://www.reddit.com/r/intermittentfasting/comments/biygsj/intermittent_fasting_faq/) Helped digestion too.
  
• Vitamin D (as in here with omega 3 fish oil...my doctor said in our modern life everyone should take vitamin D) https://www.amazon.com/Carlson-Super-Omega-3-Lemon-250/dp/B003BVIALG or https://www.amazon.com/Carlson-Vitamin-2000-360-Softgels/dp/B001LF39UG/ref=pd_lpo_sbs_121_img_0?_encoding=UTF8&refRID=DMGSKPFWGA8TEG5D14KY&th=1
  
• For a while I did magnesium for sleeping (for me it has been early awakening (3-4am) not falling to sleep or "golden milk"/turmeric but exercise (though not late evening) seems to be best sleep aid https://www.amazon.com/Doctors-Best-Absorption-Magnesium-Glycinate/dp/B000BD0RT0/ref=sr_1_3?crid=35HKXCW9CTD9K&th=1
  
• Liver pills (can't decide if those helped or just piggybacked on the other stuff, but they are basically good dose of Vitamin B which is often recommended, sometimes called a B-complex)
  
• regular exercise - I joined a $35 free-weight only gym, and do stronglifts 5x5 It is also very simple, and I can tell a difference the months I make it ~9-12 times and the months I make it 0-3 times https://stronglifts.com/5x5/#gref Outdoors, whether or not you are "forest bathing" :) is also obviously great. If anything else if you can get yourself up and out for a 20 min phone free walk before you get ready for day - after a big glass of water - 5 days in a in a row you may be surprised. Could do this before you ty quitting coffee or before you make your coffee if you still debating quitting. Huge help with energy throughout day and "resilience" vs giving up/defeatist by default, also some improvement with posture, tension in back
  
• seeing a therapist re: "cognitive behavioral therapy & general (latch onto work projects or home tasks or anything) anxiety" - what flaws in thinking ("cognitive distortions" like catastrophizing (worst case), "thought projections" (my boss is probably thinking I am screwing this up right now...No! he's busy and not thinking of you at all!), ruminating, etc.
  
  • Much of it similar to the Stoic philosophy stuff ("Man is troubled not by events, but by the meaning he gives them. - Epictetus", know what is in your control and what you need to accept, etc), there is no shortage of this stuff online, like dailystoic, subreddits, etc),
    
  • personally doing this as a Christian with Catholic-intellectual-tendencies with a Catholic therapist has been helpful (e.g. your mind and body are both good, you aren't a mind trapped in a body etc, but need to undertand interaction and limits, also God's 'Providence (not trouble avoidance) in big picture, while reflecting on parable of the talents for small picture along with the Fr Roncalli/Pope John XXIII "just for today" list which is seriously great: http://www.appleseeds.org/Decalogue_John-23.htm)
    
• Hope some of this may help.It's been discouraging feeling like Ive wasted some good months of life and so I empathize. Good luck!!! I'll prob try quitting coffee again soon too to see if that can push over the top, but for me needed "attack from all angles" and have been focusing on the "other sides" for last 1.5 yr.