Do you feel around your mother like you did as a kid? Sometimes it's hard for our parents to treat us like full grown adults, when THEY know they used to clean our behinds. It was like that with my mother, (I know about the headaches!)then a few years ago, we got to a point where we were able to become kind of friends. Now she has had a stroke, and none of that is possible anymore. I hope things do get better for you with her, maybe the talk you had with her will help. Be careful of getting too stressed out while she is there, so it doesn't spill over to your R with your H.
Will your H be able to find something full time while he is off work? I hope it won't get bad financially for y'all, you don't need THAT, too.