All the fancy "scientific" names are just saying stuff in another language
Homo=man
Sapien=wise
Terminology is very useful, so if you're looking for solutions, or trying to communicate your struggles, then a specialized term might be useful,
But there's always nuance, it could be helpful to explore ways of communicating and describing your fears
Elaborately and succinctly
I do fear XYZ
I don't fear ABC
You can also think of ways to conquer your fears
What is definitely doable
Holding your breath for 2 seconds inside your house, nowhere near water
Holding breath and plugging nose
Wearing a snorkel and mask in your house no water involved
There's probably much better and more specific procedures and lists
You could look in medical and psychology fields
But you might find better help for this specific struggle in aquatics fields
Scuba, boating, military training, live guard training
There's probably hundreds of very effective methods used every day to help people in these industries overcome fears themselves and help students and colleagues overcome
You could probably get better results with helpers, both experienced and inexperienced
Having someone there can help keep things in perspective,
Help us laugh at the monsters in our minds
Someone to hold our hand,
Someone to trust, let go of control to
Eg you can have a friend tell you how long to hold breath,
Also finding ways to laugh at fear can help
If you can find ways to laugh during exercises
Maybe put in your favorite funny movies, try to hold breath right before funny bitts, and try to laugh
Hopefully that's helpful and not annoying good luck