Dreams come from the vastness of our unconscious mind that is part of the collective unconscious of the entire human race, and may be directed by a Higher Source that is specifically connected and concerned with your individual growth towards the actualization of your whole personality-. There is higher knowledge and wise guidance contained, usually underneath what is more obviously accurate about your waking understanding of your reality.
It’s usually pretty easy to establish some connections between your waking life and knowledge and the dream IF I can ask you about some of those connections. But the keys to the dream’s deeper meanings, that will actually reach beyond what you could know before the dream’s arrival, are found by going through the “cracks in the dream’s surface,” that is, where what your waking consciousness is aware of and what the dream shows you AND makes you think and feel are in DISAGREEMENT.
4 years ago it was a man you had killed. Now it's a woman. The man was killed in the forest, which is symbolic of the femine unconscious. The ocean symbolizes the collective unconscious of the whole human race. The woman you killed is probably an aspect of yourself. Now the first question here is whether the 40 years really is 40 or just 4 x 10 or a lot. When did you get divorced?
IF the 40 years is to be taXXXXX XXXXXterally, then you lost some parts of yourself when you entered puberty that may have led to your own contribution to the wreckage of your marriage -- perhaps first to an unconscious relationship to the masculine side of humanity (beginning at that age with father or brother(s)) that has been destructive to your efforts at heterosexual love; and now with even greater insistence to a symbolic loss of yourself as a woman. What event(s) or thoughts can you remember that might have triggered the commentary of your dead-man dream 4 years ago? And what event(s) or thought(s) have triggered this dream? Sometimes it's an anniversary; sometimes it's a new issue, conflict or loss that triggers the grand-framework story that's imaged as the part(s) of yourself that you murdered, so you'll get a chance to confront the big issues behind whatever's currently reminding you of the road not taken or the blindsided blundering that everyone must do before they can find out what's driving them from their unconscious minds.
The memories that appeared in either dream would be extremely important, no matter how fragmentary they may be after the dream has passed and you haven't written them down (yet). Write down everything you can remember, even tiniest shreds of imagery, feeling, events. For your own mind can expand those remnants if you have the courage to free-associate to them--and I can guide you in doing that. You'll have no idea how valuable and perhaps shocking your recollections can become if you will follow the slender nonsensical threads by which they are still reachable. You're not online. So I'll go do my errands, and probably not connect with you until tomorrow.