Very sorry for your loss. If the bear becomes a persistent problem, you may be able to contact your state wildlife agency about it. They don't want bears coming that close to human settlement and damaging property and livestock, because they quickly become acclimated to human presence and then become potentially dangerous "pest bears," so they may be willing to relocate or if need be dispatch it.
In the mean time, do as much as you can to make your property unappealing to the bear: make sure your garbage cans and feed bins are 100% secure and bear-proof, don't leave feed out overnight in the chicken coop, pull any bird feeders you have, clean your grill and bring it indoors, hang things that will move, reflect light, and/or make noise around the perimeter of the property, and erect electric fencing around both your coop and any fruit or vegetable gardening you've been doing. If you spot the bear, make as much racket as possible from a safe location - banging pots and pans and shouting does well. Black bears are generally shy, fearful animals and will gladly turn tail if you raise a ruckus. However, you're absolutely right that coming out of hibernation and/or having young will make them hungry and desperate, so the sooner you can make your property unappealing the better.