Go to the urgent care or the emergency room (whatever it is where you are). There are medications that will help you keep your blood pressure down through detox.
Seriously, friends! It's one thing to attempt self detox, but when **** starts going awry you need to get yourself to a doctor right away! People die from alcohol detox. People die from abrupt benzo detox.
Emergency rooms deal with this all the time. Be proud that you're quitting (no shame!). I don't know about other countries, but emergency rooms in the US have to treat you, regardless of your ability to pay.
Don't risk death right before you change your whole life!
At worst, you will have to sit around for a really long time listening to squalling infants, and a tired nurse will give you some helpful medications. Not a great night, but c'mon, this is serious stuff. Same-same for panic attacks and depressive episodes that frighten you with their intensity.
I know we're all amazing and invincible, but actually not really so much!
Go to the hospital if it gets scary!