No period but negative tests!?

Hi....I’m a bit confused, my period was due 16th Oct and I tested the next day and got a negative. I waited another 2 days and tested again (today) but got another negative. Is there still a chance I could be pregnant!? My period is normally bang on time every month so I’ve still got a bit of hope but haven’t had any pregnancy symptoms whatsoever which is making me doubt my chances.....