I understand where you are coming from. I live a part of my life in denial. I am seeing a therapist to help me deal with issues directly related to my cancers and treatment. You last week we started discussing how angry I am about what has been going on the last 4 years. I am generally speaking a happy positive person, and that's the face I almost always present to the world. I need to deal with the fact that "everything is not OK" all the time.
So yes, being in a support group and/or seeing a therapist would be very helpful. You are still dealing with the emotional impact that being a 2x survivor.