Regarding what Paxiled said:
1. A person's visible psychological traits reflect their brain chemistry. People who are familiar with neuropsychology know that. Evidently Paxiled is not.
2. The cause of the suffering sensation of depression IS known: It is the NMDA glutamate receptors that contain 2B subunits. Soluble magnesium blocks those receptors. That particular suffering sensation also plays a role in anxiety, so soluble magnesium can eliminate that component of anxiety as well.
3. GABA receptor activity reduces anxiety because it works against glutamate receptor activity. The disadvantage of benzodiazepines, compared to riluzole, is that benzodiazepines impair the function of the cerebellum, thus impairing balance.
4. Cortisol doesn't CREATE anxiety (as is often assumed), but rather, anxiety causes the production and release of cortisol.
5. SRI drugs (SSRIs and SNRIs; tricyclics are a group of SNRIs) can indeed reduce anxiety if the dose is low enough, by increasing the activity of inhibitory 5-ht1a receptors on glutamate-releasing interneurons. At higher doses, SRIs epigeneticly desensitize those same 5-ht1a receptors, thus causing INCREASED anxiety, as well as destabilized emotions in general. SRI drugs are the most dangerous class of drugs due to their potential to cause permanent epigenetic damage, resulting in permanent sexual anhedonia and other permanent ailments, so they should not be used if other drugs are available. And if they ARE used, then they must only be used at a low dose.
You have too much glutamate activity in your brain. Wellbutrin doesn't directly counteract glutamate activity, so it's not likely to work against fear and anxiety, but only depression. Take over-the-counter soluble magnesium (often called "super magnesium"), and if that doesn't work, then get a prescription for the glutamate release inhibitor riluzole.
General fear can be reduced by doing meditation. Simply "Return your focus to the present moment, and when your mind wanders, return your focus to the present moment."
Try for short periods at first, such as one minute.
Slowly you'll be able to expand to longer periods.
The first 2 weeks may not notice a difference.
Then might slowly begin to notice a change. After 2 months, hopefully the fear center of the brain is diminished, shrunk.
There are numerous meditation apps one can try. (Headspace has some nice animated videos explaining the concept.)
During this COVID-19 virus, I had a friend suffer anxiety very bad she had to go to the hospital. She was having all sorts of strange symptoms. They diagnosed anxiety. It was just anxiety. They gave her some anxiety meds, sent her home.
(She also tends to have night terrors. She'll have bad dreams and I need to wake her up if I hear her struggling in her sleep. Sometimes she's grateful I awaken her; other times she's pissed at me for waking her up.)
Maybe other people have other suggestions. Best wishes!
That part of the disease will never go away unless you cure the disease, which you can only do through therapy, lifestyle changes, sudden remission, etc., but not through drugs, which are often necessary to have a life but mitigate symptoms, not cure. But if you're on a medication and you still feel so bad life is very hard to live, the drug isn't working. You need to try something else. Sometimes in bad cases if a drug is helping but not well enough you can augment it by adding other drugs, knowing you are also adding possible side effects and adding other drugs that are not easy to take or stop taking to the mix, but studies do show greater benefit combining drugs than only using one. But again, if the first one isn't working, you don't augment it, you taper off it as slowly as you need to and try something else. But others who don't also suffer any disease you happen to get won't understand, and many people just don't like being around those who are sick, especially the mentally ill. It's not fair and it's not nice but human beings are neither fair nor nice, they are fallible beings just trying their best to get by too. Some of us are lucky and have friends and family who stick by us and understand us but some of us don't. The world isn't against you, mostly it just doesn't really care one way or the either. Outgoing funny people are going to attract more company than sad people. It just is, and I'm guessing you feel the same way. So, what to do? You're very young and quite adaptable, though it doesn't feel that way. If you're not in therapy, get into it. If your meds aren't working, talk to your psychiatrist about alternatives. Find things to do you enjoy and do them, even if you have to force yourself. Find things to do that are meaningful to you. Those of us on here do get it, but what you want isn't really support, you want to get better, right? That will take work, but you can handle that. Peace.