Hi everybody, I am a high school junior and for several years I have had very poor self-esteem and recently it has gotten much much worse.

I used to have straight As but now my grades are terrible and I have no motivation. It's because all I do is worry, and it distracts me from my work and makes me feel horrible.

Maybe it sounds like a teenager problem, but I genuinely worry all day long that no man will ever find me attractive. The different reasons as to why that might be true change very often, and usually they sound like crazy conspiracy theories (at the time that I am worrying though, they feel very real.) I check different things online for validation, but it never works because even when I see something positive I can't help but assume people are just lying.

Obviously I know that social anxiety and insecurity are issues that many people struggle with. But I have read some online articles online about different mental problems and I have never seen anyone who acts like I do.
Is this some type of anxiety or...?