If you haven't been physically hurt, I wouldn't say that these spirits want to hurt you. They might not know they're spirits, or they might just be friendly. If they haven't harmed you yet, they probably won't in the future. To get rid of them, I'd suggest cleansing your house with Sage- that's what my mom does. If that doesn't work, get some holy water, your bible, and some rock salt. If you want to get some info about who they are, use your ouji board and ask their names and when they died, etc. also- you may have angered them by calling them "ghosts" (I once called an evil spirit a "ghost" and it did not go down well).