Hello and welcome to the forum. Sorry you are having pain. Running it by your doctor is never a bad idea. Since you mention muscle strain, that could be the very reason you are experiencing this. At the base of our neck, there are several muscles and if those become tense, they do cause headaches for many people along with neck tension. Poor posture especially in this day and age of sitting hunched over our smart phones is a big cause of this. Injury is another such as whiplash. Joint issues. All of these things can lead to the type of tension and pain you are talking about. If it is truly severe and limiting your activity, then please see your doctor. In the mean time, you can try an ice pack on it, a heating pad and alternate the two. If you can keep it out of your hair line, a menthol pad may help like "icy hot". Stretching gently. Massage can be very beneficial. Taking ibuprofen. These are typical things that help. Again, however, if it is sever, then please see your doctor. Hope it gets better soon. https://www.mayoclinic.org/diseases-conditions/neck-pain/symptoms-causes/syc-20375581
Another option is to ask your doctor about natural supplements. Turmeric is one that may support a healthy inflammation response.
Are you any better suicide reaper?