Hello, I think I may be pregnant, my last period was the 14th June. And I have had symptoms like: dark, large errect nipples with blue veins across my chest leading to my nipple nausea on and off, so tired, heartburn starting the last few days. My lady parts have got darker in colour! But what is worrying me is I have had 2 negative pregnancy tests and or the last two weeks I have had brown mucous and when I wipe brown pinkish blood.