This part of the rollercoaster, almost constant triggering, is very normal. It really is you are not going crazy. This is like those long hauls upwards as you build to it, crest, and fall off of the other side. A bit of a lull, and then you start over.
Honestly. It does get better. You'll learn what is likely to trigger you and start building calluses and/or learn how to deflect, bit by bit. That will smooth out the ride. You'll still get caught by unexpected things, but the sharp up and downs will flatten out.
And your comment about finding nothing new but seeing it in B&W is exactly why I, for one, say that a BS needs a timeline to really start healing. You may "know" it date-wise, but the impact of visually seeing the actual proof, the actual dates, frequency, etc., while it can take you to your knees, can also lance that wound and allow it to sink in, be acknowledged, and start to build healthy tissue over the wound. (((hugs)))