So I got a faint line last Sunday on 2 strip tests. It was 100% there. I then tested a couple of days later and it had gone, every test since has been negative. I am now a good few days late on my period, I usually come on at 28 days, it's now day 33 and I'm getting blood-tinged discharge and have constant very painful cramping. Has anyone experienced this? I feel very emotional about it!