What is wrong with me? help please?

Okay so I unnecessarily freak out a ton. I've looked up panic attacks which I thought it was, but that says that I would be freaking out about something that I'm practically deathly afraid of. I'm not really panicking about anything that I'm scared of, more like that I have a lot of homework and I haven't started or something a long that line. I get really upset; I cry and my heart starts speeding up and I can't think and I usually start hyper ventilating. Then I get extremely mad at myself for getting upset about something stupid, and then that gets me upset again. Then I'm up all night stressing. And i cant talk to my mom...i just cant..Help me?? Also i haven't ever been tested/ been diagnosed with anxiety or anything else. and i also think i might have that problem were you always self diagnose yourself with stuff ( which is ironic because im self diagnosing my self with that, but still). I think this because when i look on line to try to find out whats wrong with me and it says theres nothing wrong , this just stresses me out. because im so sure theres something wrong with me..i just dont know what!!! help pleasee!