Could I be pregnant?

Natalie
So my periods range from every 24 days to 31 days so I've never really been able to pin point when I ovulate bc it changes monthly... I was technically due for my period on the 9th but it came very light on the 8th and only last a day... Stopped on the 9th and then nothing! My normal period lasts around 4-5 days each month. 
I've been craving things with cinnamon for two weeks now and have no appetite for anything healthy... I normally only eat healthy and never touch sweets.. My sense of smell is out of control- everything smells bad and many things that I usually like taste awful! I've taken two tests and one this morning ...all saying negative.. I took the first response one... Am I just testing early? Should I try a diff brand? Or maybe get blood work done? 
Oh and my husband and I weren't trying... 😁