I had an iui two weeks ago. My period is due tommorow and i was due to test then too. I couldnt wait so i tested yesterday and i got a faint bur very clear positive line. I tested with a test that detects 25 iu/ml of hgc. I also tested min afternoon. Today however when i went to the bathroom I noticed pink/red discharge. This was 3 hours ago and ive had none since. Does this mean my period is going to start tomorrow? Have i had a chemical pregnancy? I had one last year at 5 weeks. Im so scared.