Hi I'm sorry to bother but I need some advice..

Last week friday when me and my bf were having sexual intercourse,he was using condom and when he ejaculate he pulled it out but then I noticed that there is this white sticky liquid on top of the condom and inside my vagina so I start to freak out whether its his sperm or my own liquid because I'm afraid that there is pre cum when he was penetrating..
So immediately the next day(8 hrs later) I bought Prostinor2 and ate it according to instruction, now there is 11 days left till my period and I'm so scare of getting pregnant because I'm not ready for it .Isit by any chance I will get pregnant?

This few days I felt abit weird about my body and especially my lower part,today I bought the pregnancy test and it shows negative,but I think its because I used it 6 days after the intercourse.

I hope that ppl can give me some advice..thank you..