Hey Lola,
I think therapy is important, but if you are having a hard time and don't have very much support or don't have enough resources to deal with how you are feeling because you are so busy taking care of other people, then it can be really difficult and scary. You're not a coward for deciding not to do it, you're just doing the best you can to take care of yourself right now.

Or maybe this is something you could say to your therapist? Like, "I'm having a hard time right now, and I need to slow down and work on coping/self-soothing/self-care." If you give yourself one more session to say that you're overwhelmed and you need help dealing with it, you can still decide not to go back if that's what you need to do right now.