This sounds really upsetting, OP, and I hope you get to the bottom of it and start feeling safer.
I don't want to sound dismissive at all, but did you know that the human mind is hardwired to see patterns? It's an evolutionary thing, something to do with spotting dangers or something..
So sometimes a number of random things that happen in a close timeframe can be fitted into a pattern in our minds, although they aren't in fact related.
I went through a really difficult time in my life when a number of bad things, big and small, kept happening. Everything from serious family illnesses to breaking my favourite mug to a tile coming loose on the roof etc etc - I felt 'Fate' was against me and used to joke about 'The Forces of Darkness' having it in for me.
A counsellor advised me not to think, even jokingly, about things like Fate or Forces or Darkness, because otherwise I would start to feel that there really was something out to get me! And there wasn't. All these things were just random happenings in my life, a few of them happened in a short timeframe, but then again, nothing bad had happened for years, and after that bad patch, nothing awful happened for another few year, and so on..
Seeing a counsellor, as BobbyBiscuits suggests, might help deal with what you are experiencing, Or taking IwantToRetire's* *good advice.
Sending you good thoughts.