That kind of stress would pummel the strongest person. Can do you have a therapist you can confide in? Keep trying to get help, even though things have calmed somewhat your mother's illness puts stress on everyone and usually rises and ebbs like the tides. To take care of your mother and your daughter you need to get help for you. Reach out and keep reaching out until you get more support. Can you tell the doctor who is adjusting your meds how stressful this all is?