I know the feeling. Once last year my four year old refused to go to sleep, yelling about monsters in his room. Somewhat exasperated, I went into his room and turned on the light to find the biggest scorpion I'd ever seen crawling up his wall. I had a hell of a time arguing with him when he got convinced about monsters lurking for six months afterwards.
Big scorpions are not dangerous. The most dangerous scorpions tend to be smaller ones. This I leaned from Sahara desert natives. I found a small one under a rock and played with it. Those people got crazy at me.
Wasn't sad to move out of that apartment.