Hi Dylanzmama.
I had a specific instance of feeling like I was being infested by something like microbes after being surgically raped by bright blue creatures in an operating theatre. My entire abdomen down to my hips felt invaded. I was psychotic at the time, and paranoid that the psychiatrists and other medical people were part of a plot by a demonic alien force to take over my body. The sensations faded as the paranoia faded with medical treatment. But the memory of it still brings back uncomfortable feelings.