I've realized a pattern with my own anxiety after analyzing the re-occurrence of it on a day to day basis, although it is manageable.

It's tied with people I consider close to me going away for periods of time. In this case a good friend of mine -and- my boyfriend.

What triggers it? Absence. I suppose in a way its a mix of abandonment coupled with a long history of 'bad things always happen after those you care about go away for a while'. It was originally family, then it turned into one or two bad relationships. Since then, its been an almost endless sense of just dread and anxiety expecting the worse when logically nothing bad will happen at all.

It's quite irritating, at least I'm not letting it send me into a spiral.