HELP. I am 21 and I am on irregular periods. But now I already missed my period twice, this has happened before but now I was quite worried as I had an unsafe sex with my bf. I already took a pregnancy test last week and it resulted to negative. No pregnancy symptoms though I sometimes felt cramps and have lower back pains. I also have this clear sticky discharge. I am stressed out with family problems, and issues about my bf. Could I be pregnant? I am worried sick. Please help me.