Who can help me?

Hi lovely ladies, last Wednesday I posted a thread asking if anyone could help me look at my tests. The first one was very faint and there were some negative tests. The suggestion was to do another test today first thing with morning urine. So I did that and yes, I see a line. Do you see it too? Or am I going crazy? But now: I could barely believe it myself, so I just did another test and you can guess what. Negative. A "barely readable line". I bought a Clearblue test and it said (not pregnant). How is this possible? I clearly see a line from this morning at 8 am with morning urine. I would really appreciate it if you could help me look at it. I don't know my cycle because I'm very irregular. And my last period started on Aug 29.