You blood pressure can increase and decrease with anxiety, especially when you go to the doctors office. In addition, your blood pressure can adjust by 30 points with slight activity, any stress, changes in diet, dehydration, etc. I would not be concerned if I were you.
I would not be concerned about you WBC count. They are similar to your blood pressure. It is a very small snapshot in your life, and they are dynamically changing throughout the day. Unfortunately, you just caught them while they were high. There is nothing to be concerned about.
You should only be retested for lyme disease if you have had another exposure to lyme disease or if you are having rashes. Bases on your labs and imaging, there is no concern for any type of cancer. You would see both on labs and imaging. In addition, you should have a full work up for inflammatory and autoimmune diseases such as lupus, rheumatoid arthritis, etc.
If you are still having symptoms, you may want to see a neurologist soon to help with your work up. Another option would be to see a psychiatrist to also help.