I was looking for some advice because I don't know what to make of this! Sorry the post is so long!

I don't have a 'normal' cycle - I usually get a period every 6 or 7 weeks. 8 at the most. But my last period started on 22nd February and although I've had cramp for the past 2 or 3 weeks, there is no sign of a period. Every test is negative and I can't get a doctor's appointment until next week. :-( I just happened to notice one of the tests I took a few days ago when I was emptying the bin in the bathroom there. I know that you're not supposed to read the results after 10 minutes, but I thought this might be a really faint line? I know it's most likely an evap line - I've heard clear blue can be notorious for evap lines! I just wanted to see if any of you have experienced something similar? :-) x