I totally connect with you on this and have a very similar story that I won't bore you with. I strongly recommend that you consider learning about mindfulness. It has the capacity to transform your ability not to live in the past (or the future). The two best writers on the topic broadly in my opinion are Thich Nhat Hanh and Pema Chodron. Both are Buddhists, but you need not be Buddhist to benefit. For example, I am a fairly devout Christian, but I espouse a number of Buddhist (non-religious aspects) teachings. Especially mindfulness and the power of breathing. You might search around on amazon or wherever you buy books and tapes and see what might interest you. Both authors write very simply and are a joy to read.