Worried about unnoticed dog bite.

I go for daily walks. One day, I started from my home as usual and reached halfway when a stray dog passed very close to me. I didn’t feel anything unusual at that time, but suddenly a thought came to my mind: "What if the dog bit or scratched me without me noticing? Can I get rabies from this?" Due to this anxiety, I turned back and walked home. On the way back, I again passed by some stray dogs. When I reached home, I carefully checked my body — there were no wounds, scratches, or bite marks. But even while checking, I started doubting myself — "Am I checking properly? Did I miss something?" I’m very confused and anxious. This thought has been troubling me for the past 2 weeks. I feel mentally disturbed, constantly thinking whether a dog really bit me or not. Please advise if any treatment is required or if this is just anxiety. Thank you.