I understand how you're feeling, however, you have to be compliant with your treatment. You have to take your medication as prescribed. If your therapist isn't working for you, you need to find another one even if it's in the same clinic. You can't compromise your mental health because you feel bad about changing therapist. You have a lot going on in your life and it's seems like you allow your family to have a big influence on you.
Also... you HAVE to take care of yourself, like you said you can't take care of others if you can't get a hold of this. You have to come first right now. You need to stop being the caregiver, it's not working for you.
Maybe you don't need a med change, maybe you just need to take your meds on a regular basis. You're not going to be able to know if they are effective if you're not taking them properly.
I suggest you get yourself a therapist that you can work with because you have way too much going on and it sounds like you need the support.
Finding this forum will help as well. You'll be amazed at how many people are going through the same things you are