see that's the strange thing, i only have ever been in one accident and i already had this phobia prior.
This is very curious. You see, no phobia develops for no reason, there must be something that brought it up. You will know what it is, but sometimes it is very hard for us to access our memories or feelings and understand what is the cause, what brought us what we feel like about certain things.
I don't know if you will be able to do so, but if you stop thinking about what you feel when you are behind the wheel, asking yourself why do you feel like it, what exactly are you afraid of, and you manage to answer yourself about it, you may get a clue about what triggered that phobia response in you. Sometimes it is the most "silliest" of things, that we would never even imagine it is related. Another times, it is something very obvious, but we are just unable to get there immediately, and once we do, it feels like "oh wow, it was this, how very obvious!". There are even times we are not able to pinpoint it's origins, because it is something that took place in our childhood, when our memories are more volatile, and we may not even remember consciently what caused us such distress, but the effects are still there, until eventually we start dwelling on it, trying to figure it out, and one day we just get there and remember it.
Finding the root of the phobia can be important in helping us overcome the phobia we have, because the understanding of what made it exist, can help us into further deal with the issue itself, whether it be an event, words of discourage, or repeated abuse from third parties.
This is an exercise that not all people may be able to do, depending on where they are mentally speaking. I don't know you, neither I have enough information on your background to take any conclusions out of it, so only you will be able to answer that to yourself, and try to dive deep into your memories, or feelings, thoughts, when you are behind the wheel. And well, I can only make assumptions and give you more generic advice based on my own knowledge in psychology (for context, I was studying psychology in college, however - this is very important for me to add - I did not finish my course, so take this only as an advice from another stranger, instead of someone with knowledge on the field, as I am no professional).
It could be something as simple as, when you are behind the wheel, your first thought is: "I am going to mess up". Then you ask yourself "why do I think this instantly?" And from then on, you will start diving deep on it, and eventually that will lead you to the day/person/words/actions that took place in the past, and eventually turned out to be like that. Rationalizing, or trying to, our fears (and therefore phobias) can be quite helpful in overcoming them.
i'm so nervous cause everyone that's ever tried has just laughed at me
Step away from people who laugh at you, or talk to them and tell them what that makes you feel like, if you deem they care enough to listen to you. Sometimes people will laugh with no ill intentions, they just find it curious, cute, or unusual, so they don't think it is a big deal, they don't understand the consequences it brings to us as individuals, and sometimes it helps if we explain to them why it is not funny to us, and how important that is to us.
If they are people you cannot say that they care enough to listen to you explaining why that hurts you, or that dismiss your words, well... Probably reconsider having those people in your life. Not helpful at all, will only add to the problem, by stressing you further about the matter. But of course, ultimately, your life, your call, I am merely giving you my own piece of mind about it.
but maybe i can find an empathetic driving instructor…
Finding and paying for a private instructor may be a good idea, or even if you go to a driving school and ask if they provide services like instructors that can help you with driving, explaining to them that you need help in feeling at ease driving may be a good idea. I don't know where you are from, or what services are available but, for instance, in my country, some schools do provide instructors that can be there for you while you drive to help you feeling more comfortable driving, even after you get your driver's license.
thank you for your thoughtful response though :)
No problem, and I hope my advice serves you of anything at all :)