So many of us get stuck in what "should" have happened. We dwell on the things that we have no control over and they keep us stuck. Somehow we miss the fact that, no matter how long we dwell on what should have happened, it will NEVER change the fact that it did.
What we can do instead is get really clear about what is. What did happen, what is happening. When we can do this, without any shoulds/shouldn'ts, we then have choices. For example, "My neighbor shouldn't be rude" will keep you in a stuck place of anger, frustration and complaining. "My neighbor is rude," allows you to choose how you will interact with that neighbor. You can choose to keep clear boundaries with your neighbor and to learn how to communicate openly, clearly and directly. As long as you are in a "should/shouldn't", you will stay stuck.
So, what is the "what is" in the experience you had 2 years ago? What are the facts? Now, state them with a "this shouldn't have happened!" How does your body and emotions react to that statement? Now, state the facts without the "this shouldn't have happened!". Just state them as facts. How does your body and emotions react to just the facts?
Next, when you just state the facts, can you see where you may have some choices? If it is a fact that your husband has a difficult time being around to support pain and is not an advocate for you, then what are some things that you can do to support yourself? Can you find a friend or family member to advocate for you? Can you step up and be an advocate for yourself? If you find yourself getting frustrated and falling back on "Well, my husband should be doing it!", just take a breath, state the fact that he isn't your advocate (whether he should or shouldn't be), and then look for your other options.
When we choose to let go of our shoulds we will find freedom. Choices are our freedom. As long as we cling to the shoulds we will stay stuck. We have no choices when we cling to something that isn't true/real.
Byron Katie's "The Work," is a great tool to use when you feel stuck in this type of issue. You can go to her website and, for free, download her worksheets. They are very powerful and can change your life. I often use her worksheets in my own coaching practice with my clients and have seen some amazing transformations.
Letting go of the past is a decision. The important thing to do, though, is to find some tools that will support you in the letting go. We are often really invested in clinging to how things should be. It takes support and resources to help us relenquish our hold on these things. Counseling, groups, reading books, workshops, coaching, journaling, venting, feeling your feelings, finding a good support system, etc, are all ways in which you can support yourself in the, sometimes difficult, place of letting go. Most of all, be gentle with yourself. Self-care is the most essential resource you can provide for yourself right now. A fabulous book is "The Art of Extreme Self-Care" by Cheryl Richardson. I recommend it to all of my clients and own a copy for myself.