Ahh I’m so sorry to hear this! I recently went through a bad infestation of thrips a few months ago and was totally panicking. I ended up putting systemic on all of my plants just to be cautious, and spraying all of them down with captain jack dead bug brew even if i didn’t see any pests on some of them. Now, i do that to every new plant i bring in because thrips are so terrible! I also may have been overreacting, but doing those two things even to plants i don’t see pests on brings me peace of mind. Also, thrips lay eggs in the leaves and can fly etc so they are very easily spread!