noting still

I'm 20 days late I've taken several pregnancy test every morning for the past week and they all come out negative. No signs at all of pregnancy. I miss a period every once in a while and I think that's what's going on but this is the first time missing it with me having intercorse so. I've been what I think is having clear discharging. So someone who has had this happen before let me know what's going on or happened to you?