Fears of water, especially something far away from the coast, wherein you cannot see anything under say 50 to 100 feet of you, is usually not indicative of a past-life scenario. People who managed to experience that situation did not succumb from drowning on the basis of being in deep water --- they succumbed from the eventual exhaustion (depending on body composition) that well-built muscular frames experience trying to float, or worse (
hypothermia resulting in complete lethargy, numbness, with eventual induced unconsciousness).
What that fear usually indicates, is of awareness, susceptibility, and sensitivity to psychic issues. I use that term psychic, but I would rather like to use the term
subconscious, as it's usually portrayed about within one's psyche as a large body of water. Lots of things fluctuate within it, and a person is generally none-the-wiser regarding what's going on, but you sure do notice the effects of the tumult and commotion, should the placid and generally uniform nature of your every-day existence be caught along some wake of a coming storm.
This is also usually how ordinary existence is typically represented with maritime symbology. A person going about their lives in the world is typified by a sailing ship with a crew, representing the ego consciousness (3rd density). Changes in the aloft and surrounding weather (4th density) usually shudder the bones of superstitious sailors to some extent, but such changes usually materialize in significant changes in the sea patterns (2nd density). Should the boat capsize, then everyone's stuck in the churn of the waters, unless they find a piece of floating driftwood such that they're able to pull themselves mostly out of the waters, to be either carried by the prevailing currents to land, or be found by another ship.
These things have their obvious associations, in many,
many ways to terrestrial water-ways, or in-door plumbing. Firstly, they're usually installed as an after-thought by half-shod journeymen and apprentices, they're usually out of the way and hidden/disguised by the walls or floors, and they're usually poorly maintained. Whenever water damage is incurred, it's usually a disaster, for the problem was either never addressed or never maintained, many times being a mix of both things. These things contribute to the plumbing issues in many homes, and symbolically, they also represent the
alchemical nature of people, if not yourself, as mentioned above in both lived experience, and as allegory.
If there is actually a curse going about ... the first place I'd look into, is by peering over the edge, into the water, and realizing the reflection on that water, depicting yourself and the entirety of your being. I've know what merely even the possibility of emotional commotion can cause to a sensitive, and it's not pretty.
Should there be grounds for what corroboration there is between a person, others, and the environment, well then coincidences can be typified into scientific principle. The example is with teenage kids in burdensome and troubled families/homes -- the poltergeist activity that comes from the sensitive kids growing up into adolescence, with the total storm of hormones, emotions, and processes of psychological/physical maturation have no place to be dampened when their parents/families are equally troublesome psychically -- the poltergeists come about and tear the place to pieces, and all of a sudden disappear when the storms eventually do pass, all to everyone's bewilderment.
I know that, since I lived with people who absolutely did not know how to regulate their emotions -- people who were also sensitive + psychic,
who also didn't know that they were such things ... a complete travesty for many years.
If you let some high concentration vinegar waft into the atmosphere, then it'll help differentiate the etheric energy in the domicile for a little bit. Having huge grounding stones in the place will also help, until you figure out what's exactly going on. There's bound to be more things just lurking in the background, or in the waters, until you find and deal with them. When you do, then your place will feel different.
Just my two cents, and a little poem:
A curse oft sullies one's purse, even bringing about a hearse;
Yet to flip that dreadful malediction, into a forsworn benediction,
One needs to make habit of addressing,
All such things that one was repressing;
And soon you will swear what is had, is none other than a blessing.