I think I might have had a splinter. I'm not sure though, so can you help?

Okay, so awhile ago I was cleaning up cover slips for a microscope. These are VERY thin and several broke whole picking them up. I felt something poke my finger but didn't pay much attention, because I looked and couldn't see anything. A week or so later, the area where it was poked has a callous like area on it, but it's on my fingerprint area. It doesnt hurt unless you press it hard and I can't see any splinter, but it sort of feels like there may be one under it. I'm a huge hypochondriac, so even though it's nothing I'm panicky anyway (and I am terrified of doctors, so can you try to help me out here?) Thank you so much :)