Feelings brought up in therapy did not make me worse but the obsession with it was not healthy for me and could become counterproductive to my goals.

I have a lot of experience with anxiety, different kinds, including health anxiety. The best for the latter, to sum it up: good self care. Not to neglect my health, not to engage in self-destructive habits, keep up with regular health checkups. I still experience anxiety but I know that I don't do things to make it worse and I get external, more objective feedback. When I practice good self care, the best way to handle the anxiety flare-ups for me is to ignore it, knowing it's not much else but the "games" of my brain chemistry. Also, a big ones is try not to procrastinate things (health care and other things), which I am prone to - exactly driven by anxiety - procrastinating always makes it much worse, it's a form of self sabotage really. Therapy did not make my anxiety itself worse but using it as a distraction from important everyday stuff did. It helps much more to focus all that effort on healthy discipline and lifestyle. I think that people who are prone to anxiety already tend to overthink and overanalyze, and psychodynamic therapy often encourages that further. I do find it helpful to be highly aware of what can trigger my anxiety, but I've learned most of it from observing my patterns in everyday life and from consciously resisting destructive urges, including the urges to introspect too much (something I am very prone to).