Going crazy right now!

Emma
So I'm 4 days late and have had a wet feeling for the last 4 days. Got really heavy discharge and had really sore boobs for the last 2 days. Having slight cramping since Thursday but still no sign of AF. I have taken 4 home pregnancy tests since Thursday and all are BFN! What a waste! This is so frustrating. We have only been TTC for 3 months now but I am normally pretty regular. I'm not sure if this is because I have come off the pill and my hormones are regulating but since being off the pill I have had 2 heavy periods and we're both when Glow had calculated it should be. I have taken a test about an hour ago using a clear blue digital test which I know it probably should have been fmu but I thought that maybe this time it would be positive! I am feeling so moody and emotional today. What the heck is going on?? Can anyone offer any advice before I scream or cry! All I want to eat is junk food but then again my appetite isn't great today! Any advice would be greatly appreciated. Thanks in advance!