I've now found three of these little dried bugs in my bed. I don't think they look much like bed bug skins (I found an example pic of these here
) but maybe that's just wishful thinking on my part.
They look to me like whole (shrimp-shaped?) bugs that have been flattened on their sides and dried out. I can see tiny black eyes (on the right end of the bug in the photo) and also a thin black line down the back that looks like an intestinal tract. The left end seems to be a slightly curled around tail. They also look to have lots of little legs, some of which crumbled off this one before I took the photo. The whole bugs are probably about the width of a fingernail in length.
I've searched my sheets and mattress, including seams, but can see no live bugs anywhere. There are some tiny black specks on my sheets (hard and flickable, not stains) that I've now become paranoid are bug faeces, but could just be dust/dirt. I've changed my sheets since I found the first bug, and just found another on my fresh sheets.
Anyone have any ideas? When I try to search for anything related to 'bug found in my bed', all I can find are bed bug horror stories. I'm in London, England if that helps at all.