There are tests now that can diagnose what type of dementia you are dealing with. LBD has a brain scan and a skin puncture that, together, can accurately diagnose if it is LBD or not. Talk to a neurologist with a specialty in dementia.
Blessings to you. My husband has LBD (diagnosed a year ago) and my mom also has dementia. We all live together and each do our best every day. It can be really rough some days.