why does it happen?

I'm having the weird feeling that liquid is coming out of my vag, bit I'm not on my period, it should come on the 18th. I just had white creamy/sticky discharge today, very very light brown, it was really hard to see the color 😬, and yesterday I had a discharge that looked like lotion (white). I had unprotected sex during my fertile week, I'm around 7-8 dpo, what could this be? I never felt this way before my period.