Could I just be testing too early?

So today morning i took a hpt (the walmart 88 cent ones) and got a BFN. But my SO has recently been having nausea and can't be around food nor eat it because of the nausea. I've had an increase of CM recently it is more watery but

also has a cloud look to it. This is usually every morning and thru out the day. like a day or 2 my CM smelled like period blood but no blood and still no blood. Af due in 5 days I was just curious if I could be pregnant and Im just testing early?