5 days late 2 negative tests 😢

Hi all looking for some advice please. 
This is our first month of actively trying for our 3rd baby. Started trying again on our honeymoon. Not been on any pill or anything before. 
My period was due 5 days ago. I woke up at 4am today with really bad nausea. But had 2 negative hpt's. Could I possible be pregnant still?! 
Thanks to you all for reading x