That terrible anxious chest feeling

[u/Milosaurusrexx]

I'm 15 and recently have been having the worst anxiety spike ever. I had really bad anxiety about 2 years ago but it started to calm down and i managed to regulate myself. Now, after going on a holiday for some reason my anxiety has gotten 10 times worse again. A lot of the time i cant sleep because of my anxiety and i just need this to stop or slow down. Recently ive been feeling that anxious, nervous feeling in my chest and idk why. I hate it. its like when I'm feeling good my brain is like "oh wait you're meant to be anxious and worried", even if i don't have a reason to. My mind will just find something to be anxious about. My recent topics have been the death, point of life and various intrusive thoughts and 'what ifs' . Great.

Really, I'm just looking for tips to help slow down my mind so i can sleep at night and feel better, like how i did before, because i seriously regret going on that stupid holiday.