Faint line...what do you think?

I'm usually irregular with my periods since being off the pill (5-8 days later than a 28 day cycle). My LMP was Aug 26th it's now Oct 3rd. I have had cramping, major constipation and very tired (yes all sign of pregnancy but could be my period as well). So, I took a pregnancy test today and it came out negative, so I threw it away, came home a few hours later and saw this. Let me know what you all think :) I see a faint line but the fact that I took it and a negative came up first, convinced me I wasn't. But after seeing it again later now I don't know what to think. Thanks everyone :)