Need some reassurance, pretty please?

Hey everyone!

Ive been using caffeine since I was about 11 years old, Im 22 now. So thats more than a decade of caffeine abuse.
I mostly drank coffee, but the last 3 years I switched exclusively to tea and I drank A LOT of it - about 2 liters everyday, loose tea as well, have no idea about the mg, but it was for sure a lot.
Ive also very frequently abused pre-workouts, which are infamous for their high caffeine content.

In november (2023) I overdosed on caffeine (drank way too much tea). Nothing too terrible, just felt super jittery and unpleasant, thought I was going to die for like 4 hours straight.
I hated the experience so much that I decided to stop taking caffeine altogether.

Firstly, I tapered off, drank about 1/2 liter of tea instead of 2. This continued for a month (december).

Since january, I am completely caffeine free. The first week I didnt really feel any different, but that might be because my gf makes amazing chocolate cookies (that contain caffeine) and I go pretty hard on them. The second and third week though, are a different story.

For the first time in my life, I got a panic attack. No warning, no reason, I was just eating lunch and suddenly bam, I felt like my heart was stopping, couldnt focus, couldnt talk, eyes felt funny. I got home, slept out of it, woke up and I thought all was okay, just a bad episode.

Fast forward a couple of days, I was going to work and suddenly my vision got super blurry and heart started racing, again, no reason at all. I was convinced Im having a stroke and almost got myself into a hospital.

After that, everything got worse - the last two weeks Ive been having extreme anxiety, health anxiety and panic attacks (almost daily). I always considered myself a pretty stoic guy, even when I feel terrible I have a very hard time crying and "exposing" my emotions. Yesterday I got home from work and I felt so bad (another panic attack) that I bawled my eyes out on my gfs shoulder for 30 mins straight. Not sobbing, but full on ugly crying. Ive never cried so hard in my entire life.

I had no idea what all of this could be, until I remembered that I rather abruptly quit caffeine, a drug that I was completely dependent on for a decade.

Has anyone else felt anything like this? I thought the withdrawals would be fairly simple, just a couple of headaches and tired days, I would have never guessed that Ill go through something like this.

Some of the symptomps I have:
Daily panic attacks, extreme anxiety, health anxiety. My eyes feel funny and blurry all the time, heart beats stronger and faster than usual, and the worst one - depersonalisation. Im not feeling like myself at all, I have this massive brainfog and I cant think straight, cant focus on anything.
Also I have this sense of impending doom - Im convinced Im about to die or something is going to go terribly wrong.
I also sleep about 11-12 hours a day and have super vivid dreams.

I know you guys arent health professionals, Im actually going to the doctor next week for blood and other testing, because I truly feel like garbage.

I just wanted to know if my mental state and quitting caffeine are somehow related in any way.
Has anyone felt anything similar to this?