I felt the same thing that you did. I never felt the crawling sensation before my Humaworm cleansing. I would think that you may have Pork Tapeworms because they migrate to the head. I felt mine scatter and when they did, my scalp itched like heck. After a few Humaworm cleanse, which I have done 4 and I am now on my 5th as we speak, I don't feel any movement anymore. I also don't get the headaches that I used to.
I also had several MRI's and yes, they hide very well. They couldn't see mine either on the MRI, but I felt them crawling under my scalp.
The Humaworm will kill them so don't worry. They have no where to hide when you take the Humaworm. It may take a couple of Humaworm cleanses or it may take three but you will kill them dead in their tracts. Hang in there, you are NOT the only one going through this and you will get through it. Better dead and out than left in doing all kinds of harm.
If you followed my posts then you know what they did to my brain. Now I believe that I am going to be fine in the future thanks to Humaworm.