Depression, anxiety and crazy

Okay so I have been suffering from a very light depression for a year where I just started losing interest in sports etc, but when my brother committed suicide this summer, my depression escalated to extreme. It eventually went down a bit but its definitely worse then before. A couple months ago I started getting anxiety whenever something (clothing, necklace) is too tight on my or when anything touched my neck. I get numb all over, have trouble breathing, start crying and panicking and can't move. It happens pretty often now. And just recently, I've started feeling like I'm losing a sense of myself. I feel like I can't hold conversations anymore and today I was walking through a crowd and my mind just started picturing everyone as skeletons and I looked down at my hand and it was like a skeleton hand and whenever I touched something with my hands or stepped with my feet I'd start having an anxiety attack. Please help I'm only 15 and I don't know if I should go see a doctor about this or if I'm just imagining things

Speak to your parents/guardian immediately!You need medical help for depression. There are medications available for all these panic attacks. Once treatment starts you will start feeling better.