When did this happen? Long time ago? I'm asking because I believe you asked about this already based on your previous questions.
The odds of having an identical situation from the one you had previously are very low. Based on reading your posts, are you a long time anxiety sufferer? My best advice to you is to talk to a doctor about anxiety. It's treatable and it seems to interfere with your life a good deal so well worth the effort to overcome it.
With regards to a condom breaking, if this is indeed a second time this happened to you, the advice is identical to the last time you asked about it. The odds are very low at less than 2 percent from a single unprotected sex episode. You will need to test at 28 days with a DUO test but would not be overly worried.