You mean a doc gave you pills that treat anxiety or depression without diagnosing you? Frankly, few general practitioners can diagnose anxiety or depression unless it's really obvious or it's a long-standing problem. It's not that easy to tell a chronic problem from a short-term stress. A psychologist or psychiatrist is better trained to do this diagnosis, with psychologists studying the most psychology of any health professional. You don't mention what pills you got, but don't stop taking them abruptly. They are not easy things to take. Okay, that being said, you would know it's anxiety if you chronically think anxious thoughts that get in the way of you functioning. If a sensation on your head is your only problem, I suppose it could be from stress or anxiety, and obsessing over it might also be a sign of anxiety assuming it doesn't have any physiological cause. Not sure how a blood test would tell, but also hard to see what an MRI would tell you, either. So the question to answer is, are you having depressed thoughts? Things not enjoyable anymore? Having anxious irrational thoughts, other than just this one? Feeling afraid of doing certain things? These are the kinds of things you would have if you had an anxiety problem, and they would have to be significant and significantly affecting your ability to function to justify medication. Meaning, anxiety and depression do have physiological components, but they are thinking diseases and you would notice you are thinking these kinds of thoughts obsessively and to your detriment. I can't tell you why your scalp is tingling or what's going on. Assuming it's not anxiety, it could be lots of things, even your posture while using cell phones or computers. Some of it sounds like a nerve problem, which could be coming from your neck, for example, or it could be a vascular condition similar to a migraine but without some of the other symptoms. Can't tell you, but I can tell you, if you don't have an anxiety problem you don't want to be taking meds that alter the way your brain works, and before you did that you'd want to get a diagnosis from the proper professional and also explore whether therapy would help before just taking these very difficult medications. Peace.