Sometimes our lives change when we experience a grief incident. There is a homeopathic remedy called Ignatia. It is for people who "haven't been the same since" or the problem started when "incident happened." Sounds like you. I am not a homeopath, but you can google it. There is a homeopathic forum, not CZ, that you can look up that has talked about it a lot.
Additionally, from this same forum, one Doctor recommends the combination of two Bach Flower remedies, Agrimony and Mimulus. Apparently the dose is three of each, two times a day, or two of each three times a day. I bought these and am taking them, but not long enough to have my BP tested to see if it works.