You have a lot on your plate. I'm sorry to hear about your husband's conditions. I can totally see how you feel like everything is too much. All of that IS too much for you to handle. Make sure you speak with your therapist about all of your concerns. Stay on your daily regimen. You are doing great by even being able to handle what you have so far, so don't think you're thin skinned. You're a lot tougher than you give yourself credit for.
Hugs.