I went to the bathroom when I got up yesterday morning and when I wiped I had some discharge that had streaks of blood. I thought my period was coming so I put in a tampon, when I went to shower I pulled it out and it was completely clean. Nothing since. Here's a pic of my calendar and the days my husband and I had sex. But we used a condom each time, no breaks or leaks. Is discharge with blood a sign my period is coming or something else? My period is due tomorrow.