It is difficult to know what might be wrong. When you became aware of God, something about that new awareness may have frightened you. Perhaps you became aware of how fragile life truly is.
You might also be experiencing a type of existential anxiety. There are many definitions but generally speaking, existential anxiety refers to the anxiety one feels when they become aware of their being and the possibility of non-being (death).
It is difficult to know with certainty what may have happened but it seems that a definite change has occurred. As you stated, some of the changes were good and some were not. You did not explain the good changes. The changes that concern you include: paranoia, anxiety, mood swings, and difficulty interacting with friends and family.
Among others, one specific question you asked is whether you can save yourself. The answer is yes. The proper way to handle this situation is to be evaluated by a mental health professional. An evaluation can determine if your symptoms are indicative of a mental health disorder. Anxiety and paranoia do not develop in a vacuum. It is important to determine their origin and to develop a plan of action. The good news is that your symptoms can be treated with talk therapy, medication or both.
Consider choosing a therapist who is familiar with your faith or who is spiritually oriented. Many mental health professionals incorporate faith and spirituality into their practices. Interview several therapists and choose the one that you feel the most comfortable with. The “find help” tab at the top of this page can help you find a mental health professional in your community. You may only need a few sessions to address your concerns. I wish you the best. Please take care.