Someone ease my mind please!

I had anal sex on Tuesday this week and on that day it was 3 days after my period ended. Also I’m on the pill. During anal the condom broke but we heard it and he pulled out. There was a little precum that he squeezed out into his hand but he said non of it touched my vagina. He also never put his penis inside of me. I saw the precum go into his hand and no where else.

I understand you can’t get pregnant this way but I’m overthinking that a drop somehow got on me, what would be the chances of pregnancy then? It’s my biggest fear and I’m having so much anxiety over this when I shouldn’t be. Someone ease my mind.