knots behind ear and on neck

I woke up a couple of days ago and found two knots on the bone right behind my ear then the following day I found a knot in my hair line about even with top of my ear a little bit in front of the ear then a knot appeared at the bottom of my ear lobe at jaw line and now today there is a knot on the muscle on my neck behind my ear it is painful have to take over the counter meds for pain causes right side of my head to hurt and is causing me to have headaches if anyone could give me some input on what they think this might be and if it is serious and if I need to see a dr please let me know this is worrying me thanks.