Anyone get BFN's despite being pregnant?

A
I'm just wondering if anyone took a while to get their BFP or never got one and still found out they were pregnant.
I am convinced I'm pregnant but the tests I've taken so far have come back negative. 
Had a very strange AF about a week ago. It lasted 2 days, was very light and on and off and was bright red and watery. Nothing like Korean AF. I spotted for about 3 days after that. 
For the last few days I have been feeling nauseated, the smell of cooking food makes this worse. I have very sore boobs, I feel extremely tired and I have a horrible Metallic taste in my mouth. 
What is going on!? 

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors