So confused

Hey everyone!
I'm 31 and my husband and I are ttc baby #2. My first day of my last period was September 11th. My cycles usually last anywhere from 33 to 38 days being the longest I've gone before I start my period. 
With my first child, I didn't ovulate until right before my period. So it took a long time for anything to show up on pregnancy tests. So, I haven't started. No sign of starting. I took 2 tests and they were both negative but I'm thinking maybe it was too early?
Could I still be pregnant? Is it possible?