Pregnancy

My menstruation is during 2nd week of the month, since I had contact ,I was confused. it happened sept24 then my mens came Oct 24. my feelings were not normal as I felt before.. and until now my mens never comes. Am I pregnant? or just stressed ? I already used pregnancy test this last 3 days, I bought 2 pt, negative in my 1st used then after 1 day I tried the other one, same brand and I see something on second line when I put it into light. now I'm thinking about faint. I dont know if i am just imagining that line. How can you help me with this. I want to know. pls. thanks a lot.