I have had pressure in the back of my head, and neck, and also dizziness over the course of a month. i have had ct scans of head, ct scans of abdomen, ekg's, blood work. all normal, accept for elevated hct, rbc, and hgb. is this just my anxiety?

Probably. If you have pushed to have these tests done with only the symptoms described they are not providing the real answers you seek. Many with anxiety look to a medical reason to explain it when it has nothing to do with the cause. It is just more socially & personally acceptable to have a medical issue than to work with a life coach & explore other potential triggers.

It is not feasible to provide a meaningful opinion without taking additional history, physical examination and may be some tests. It would be prudent to see your doctor and discuss if you may be depressed. Counter-intuitive as it may seem, exercise may help. Start with low intensity exercise such as walking and gradually increase the intensity as tolerated. Drink more water. Wish you good health!