Blood clots do not move like you have described. A blood clot in a leg vein can travel through the heart and lodge in the lungs. The leg clots are usually a result of a circulation problem.

Your clot in your head is more like a scab. Blood escaped the capillaries and collected where it clotted. It can not fit back into the very small capillaries until it dissolves. By then, it is a solution of broken down cell matter.

Again, you likely found something that has existed from time to time. You noticed it and ended up getting focused on it to an obsessive level. This whole process is just a symptom of your PCS cause anxiety.

It is not a toomah. Not even a tumor. It may be simply a lymph gland. I have a vein near my temple that sometimes sticks out. If I toutch it, it appears to roll around under my finger.