Suggest Remedy For Persistent Headaches And Speech Issues

I have a headache that ranges from a dull ache to extremely painful on the left side of my head for two days. And today, I've been experiencing a cold sensation that travels from the back of the right side on my head to the front of the right side. It is like having cool water rush under the skin. It has been happening all day. I have been having speech issues off and on. Mainly issues of word deletion and syntax.