Side effects of quitting heavy, daily drinking cold turkey

Ok so I recently have decided after much soul searching that is time to give up alcohol entirely. For good. I have heard, and read some things that indicate that quitting cold is dangerous. I definitely don’t want to start drinking a beer now and then to avoid this but I also don’t want anything serious to happen. I was feeling really great when I first stopped but not the depression is UNREAL, can’t sleep, super emotional, horrid anxiety and I feel like basic functioning (at work or home) is downright torture. This is not a sob story. I fucking did this to myself and I am reaping the consequences. My main concern is how long does this awful shit last and is it really dangerous like Google says it is. Seeing my therapist tonight so that will be good for me to talk about all of this.