Confused

I am supposed to get my period on the 13th Jan. Yesterday I had a light brown spotting. I thought me pms is now on its way? Today I was just getting a little yellow discharge this morning. I did take a pregnancy test yesterday and there was a second line but it was faint. If you can hold the pregnancy stick in the light you can see the second line. I asked 2 other persons if they can see the second line because I don't know if my eyes is playing with me and they said they see it but it's very light. It's not clear enough to can tell 100% it's confusing alot. I'm feeling nausea this morning and my breast still hurting. Have someone else also experienced the same. What do you ladies think? I will take a test again today