Yes, Whethertomorrow, I had exactly the same experience with a spider. I first thought I had burnt myself on the top of my hot water bottle (unlikely)....I was reading at the time and just tied to ignore it. It increased in itching and started to hurt. I put my arm under the cold tap to try to sooth it. It was a red and swollen patch about 2 inches long. I put some anti histamine cream on it as it had become increasingly sore and sensitive to the bed sheet and wrapped a soft piece of material around it. Next morning, very painful. When I made the bed, I noticed a few tiny spots of blood, and further down a very small squashed spider only the size of a small fly. It took a week to clear up and was really painful. Yes , now a bed check at night. I have never experienced this before in my 80 years and various encounters with spiders. Complete overhall of all bedroom furniture and application of much peppermint oil etc.