I hit my head getting into the car on Sunday, and did not experience any immediate pain, dizziness, or sickness. In-fact, I went on to study for 6 hours, and then went out that night! However, Sunday night, while I was in bed, I realized some sensitivity on my head, and felt a knot on the lower part of my head above my neck, and then on my neck, kind of above my shoulder. In addition, there s a knot kind of above my ear, but still on my head... It s as if the 3 knots are all in a line starting from the top of ear, nape of neck, and then to my neck. It s been two days, and I am still NOT experiencing any dizziness, or sickness. No headaches either. I woke up with a slight sore throat Tuesday morning, and feel minor minor pressure in my sinus . I don t have insurance, and so I m not exactly sure what to do, especially because I m not experiencing any side effects. However, the knots are sore to touch, and to be ho nest, I did not hit my head that hard. I only yelled a profanity, but went on with my day without any immediate side effects. Any advice is appreciated! Thank you! P.s. I am a 26 year old female.. in general good health as far as I know!