In my research, I have found that everyone has a specific alert system, if you will, when spirit energy is around them whether it be headaches, visions, sensations, scents, cold spots ect. Now, check this out...I have had severe migraine attacks all my adult life. No prescription med helped and the only symptom I didn't get was the nausea. Now that I understand my one of my abilities more, if I address it, it goes away. Sometimes it takes longer or if someone is persistent and the pain is too much to bare, I will take something...Excedrine is still my friend lol.
Maybe you are dealing with something new if it hasn't happened before. Everything happens for a reason.