This is the 2nd time I'm writing it down on practo. Please understand my question. Me and my gf had out oral sex. She gave me an oral first I kissed her well and went down to lick  her genetials. Is there any possibility that my pre-cum got to her mouth and when i kissed her I could have carried it from her mouth to mine by saliva. Then I went down to lick her genetials . She has irregular periods . She missed this time. And she was a bit worried. Is there any possibility of pregnancy because I might have carried pre cum in my mouth while I kissed her is there a possibility to happen such way . I'm worried because I went to her genetials after kissing her. She kept seeing whitish smear in her underpants for 4 alternative days and now it's not there. She complained it as sexual arouses. We to confirm took urine HCG test to check it gave a negative after 2 days of missed periods second was taken after 4 days of the 1 test and it gave a negative. Please advice. Thank you Docs in advance.