Your symptoms may be the result of postpartum depression. They could also stem from the return of your husband. It might be that your routine at home has changed and this has triggered a return of your symptoms.
You described your marriage as being perfect prior to his deployment and the birth of your daughter but your lives are drastically different now. Your relationship has been altered by the addition of a child. You and your spouse may need to adjust to the changes. The adjustment period may take some time.
You mentioned resentment. It is possible that you are feeling resentment about having to give birth alone and having to care for your daughter alone for the first few months of her life. Your feelings of resentment are understandable but not justified. Those feelings may be negatively impacting the interactions with your husband.
All of my attempts to explain your symptoms are based on a very short letter. I do not have enough information to know why your symptoms have returned. More important than determining a cause is the seeking of proper treatment. My recommendation is to return to your therapist. It seems as though you have had success with that before. If therapy worked once, it would likely work again. Do not hesitate to write again with additional questions. Please take care.