I am an EMT. Yes it is anxiety and that is what is waking you up in the middle of the night. You might want to see your primary doctor or psychiatrist to get you on some meds to help ease it for you when you sleep
Try taking ashwaganda capsules. My partner was having some issues at a time and that is something that has helped both of us with our anxious feeling. We both were smokers at a time & it helped even then when he Mary Jane paranoia kicked in
Maybe some melatonin or CBD gummies before bed can keep your nerves calm and help avoid the panicky wake ups. I don't personally experience waking up with a faster heart rate but I do wake up very often. Taking gummies helps keep me asleep, or atleast fall back asleep quick from still being 'drowsy' most times