I'm self-disciplined, then rarely, i completely lose it. help?
Since early high school I have been under the influence of depression and anger management. I'm alright now, and generally in good control of myself and my emotions. One thing I know I suffer from is paranoia/anxiety when it comes to trusting people. I have a very tight and small group of friends that I don't doubt for a second, but the rest of my friends - and people that I newly meet or know at a distance - I have trouble trusting and liking. I can live with that, I'm sure, although it does make relationships with people a little difficult. Anyway, that's info, because the real problem is that sometimes I completely lose it to a point where reality escapes me. I feel terrified of death but at the same time it feels like the only option because nothing in life seems worth it. In these moments I get extremely upset and stressed, I don't think and consider overdosing and stupid things like that. I have absolutely zero judgement when I get like this. When these moments pass, I tend to look back on them and shrug them off because I suddenly feel as though I've overreacted and that it won't happen ever again.
I don't have a single clue what's wrong with me, they really are so unexpected, almost like I bottle something up that I'm not aware of and then just snap. I'm only just cooling from it today, gaining my motivation back and starting to function happier.
Help please?