Six weeks since last period -- 3 negative test results

Emily
I have had very regular periods, usually 30-31 day cycles for my entire adult life. In April I had Paragard removed after two years and have since had two regular periods. But I am not coming up on being two weeks late for my period! I'm not TTC, but after having Paragard removed I have not started any other type of birth control. We have used condoms though. 
I have taken three home pregnancy tests which have all come back negative. I'm worried I might be pregnant because I also have:
- White Discharge
- Tender breasts
- Some nausea 
- Bloating for over a week
- Feeling emotional 
I have a doctors appointment scheduled for tomorrow to be tested. Anyone else have negative results when pregnant?!