More likely than not. Just before that, you should definitely read about them, for example, MAO inhibitors are the most difficult group of ADs, and they have not been used for a long time. And the most modern ones are SSRIs (zoloft, escitam, fluoxetine). If you have already decided to choose yourself, then start taking with small doses, then there will be side effects (weak tranquilizers will help to mitigate them), this period should be tolerated in order to hear the "sound" of the medicine.
About going to a psychiatrist.
A doctor (not all, there are some!) You may prescribe a drug that is beneficial for him to prescribe because he will receive interest from the pharmaceutical company for the prescription and not the fact that this particular drug will help you. Plus they will be registered.
Maybe yes, but I know for sure that you can find the cause of your depression yourself, and only then the ways to get out of it - physical activity, running, walking, good books, valerian and motherwort for the night, etc. Etc.
No. You have to understand: any attempt at self-medication will necessarily lead to failure. You found somewhere on the Internet, on the forums, drug N. Then you bought it at the pharmacy without any prescription, looked at the annotation, and started taking it. They did not get an effect (and this is at best, there are decompensation and complications).
After a failure, you go to a specialist, admit that self-medication is useless, and then a problem appears. As a rule, after a chaotic intake of the drug, it is impossible to prescribe it again, because when a person suffers from depression or anxiety disorder, very subtle biochemical mechanisms are disrupted that are designed to maintain a certain level of anxiety, optimism, mood, and so on. That is, those substances that contribute to the functioning of the human neuropsychic sphere. This is a very complex structure.
We, completely not understanding what we were doing, got in, loosened this structure with the help of a potent drug. After all, an antidepressant is not activated carbon. The biochemical system that controls the level of anxiety, mood, and so on is a complex structure and not very stress-resistant. This is bad news. But there is also a good one: the correct use of modern medicines makes it possible to restore the functionality of this structure almost completely. We need a qualified specialist.
You can try to act on your own. There are many different kinds of herbal remedies on the market. It is herbal remedies, but not homeopathic remedies. Homeopathic balls will not harm you, but you will waste time and the condition will worsen.
I would like to write that "you can pick everything up", but perhaps I will say no. A firm and confident "No." Antidepressants have many side effects, and some of them increase the risk of suicide.
And in general, you will hardly be able to diagnose depression in yourself.
This is an extremely serious condition in which you would hardly be able to visit this site and ask this question.