I had lots of anxiety/panic issues both in the last stages of my drinking and in early sobriety. It does get better, you are still quite possibly in the acute withdrawal phase. If you haven't seen a doctor you may want to consider a simple checkup and some basic bloodwork just to make sure something isn't way out of whack, I had dangerously low levels of potassium and my blood sugar was messed up too simply due to eating poorly and drinking so much.