It will get easier. I went through a very hard period when I stopped drinking wine, and my heart pounded in my chest, I felt anxious, I couldn't sleep, my hands trembled, and a host of other symptoms.
The bad news is: they sucks.
The good news is: they will get better. It will feel like a lot longer than it is, but in a few days you will feel better. This I promise you, from experience.
It sounds weird, but you know helped me? Watching episodes of Star Trek: The Next Generation on Netflix. Maybe you're not a sci-fi fan, but having something to watch during those sleepless nights might help you get through them.