Bug bites blow

I keep getting little bug bites all over, which is a tad annoying. Although, truth be told, there is only one of the bites which causes me any sort of worry, and this particular bite is worrying me quite a bit. It's a bite on my right knuckle that while the bump itself is not that big or out of the ordinary, it has this red area circling it. Also, the bite bump has become almost calloused looking, which is not a good sign. This might not normally worry me, except that I know that we have brown recluses and other similar type spiders in the house. It's probably not that likely that I've been bitten by a recluse or hobo spider or anything of the like, but I don't really recall having a bite exactly like this before. I think it showed up either yesterday or the day before, and hasn't turned colors or anything, so they say that's a good sign. Although, having looked at the symptoms for a hobo spider bite, I'm not out of the woods for worrying yet. I'm going to be watching this thing very closely, and at the slightest color change or blister popping, I'm so heading for the doctor. It's probably nothing, but recluse bites are not something to take chances with.