Donna, you need to talk to the Doctor and get some help for YOU to cope with things.

The dogs aren't an issue; neither is Nana. You are stressed almost to the breaking point, and if you don't look after you, you'll be completely ineffective.

there are many highly effective medications to help you with the stress, and there is no reason for you to feel the way you do. Talk to your Doctor, and talk to a councillor. You need to GET some help before you can GIVE effective help
Wayne