10 days late no bfp?!?

Shiann • Married the love of my life May 23, 2015. Miscarried our angel baby June 10th 2015, currently expecting our Rainbow baby Alijah Nathan 08-15-16 🌈🌈
Help I'm now 10 days late haven't tested since 8 days late but that test was negative this is the first time in all the time that I've had my period that I've been this late what could be going on? The last time I was pregnant back in may(ended in miscarriage) I got a positive test before I missed my period, so should I rule out pregnancy?