It is looked like obsessive thoughts but not an typical OCD. Cause effect relationship is clear. So, there is a very good scope for cure and your QOL (Quality Of Life) would definitely be improved.
You are trying to do exercise i.e. thought controlling exercises, while you mind is already hampered by uncontrolled thought process. So, its helpfulness is doubtful.
Next Steps
Consult with Councellor/ Clinical Psychologist/ Psychiatrist/ Homoeopathic Psychiatrist
Health Tips
Homoeopathic mode of treatment is a better option for such condition, where cause effect relationship is clear.
So, it is better to consult with a homoeopathic psychiatrist.
Practice of exposure and response prevention with meditation are good things but these responses or results should be monitored by someone else not only by you.