Unprotected sex with my gf

Patient: Hello sir/madam,I had unprotected sex with my gf on 28th oct morn. I dint cum inside her vagina but still am worried about the precum. I even dint put my penis inside her vagina completely. Her last periods was on 5th of oct so i am guessing its not her fertile period. And she even took an ipill 29 hrs after the sex ie on 29th morning. Its been 3 days she took an ipill and she hasnt faced any side effects til now. I and my gf are seriously worried.Is there any worries?? Suggestions on this would be really appreciated.Thank you