I'm an 18 year old female and I've had really bad health issues for about 3-4 months now. I've had a death, moving, and breakup. So a bunch of stress. My heart has been been getting faster and faster over the past few months (it's constant). I also found my lymph node was hard and swollen. So as a person with anxiety, I freaked out. Went to the doctors with a 140 resting pulse, got tested for thyroid issues and everything was fine. So they put me on beta blockers and referred me to a cardiologist. Cardiologist did an EKG and everything was fine as well. He said I have Sinus Tachycardia and the cause could be anxiety. Then got referred to get an ultrasound on my lymph nodes where they found out that I have calcified lymph nodes in my neck aka a calcium buildup over them. I did have a horrible flu about 5 months ago so maybe that's it? Doctor didn't seem concerned at all because they are less than a cm. He wanted me to get a CT scan just in case though. I'm really at my ends here and not sure what is going on. Could this really all just be a past infection and some bad anxiety? I'm not experiencing any other symptoms except for fatigue.