What is this?

It's hard and rough no pain appeared out of no where and it's gotten bigger and it's happened shortly after getting pregnant. .. All I come up with is a wart and they say warts are contracted through contact.. but I don't interact with anyone except my husband and son and if at all possible I don't touch people... I won't even hold someone else's baby. I'm a huge germaphobe I wash my hands like 100 times a day. So what is this? Is it a wart? My husband thinks it's a calloused over burn.