Need some help!

Hey! So last month my period was extremely scant and only 2 days, if that. A typical period for me starts out a little heavy and gets lighter and lasts 4 days. I didn't think much about August's period.

Fast forward to this month, September. I was due for my period yesterday. However, as of currently, I still have not gotten it. I took a First Response 6 days sooner digital and my result came back negative. Strange thing is, I'm not currently experiencing any kind of symptom other then just my missed period. I feel I am eating a lot more, but I am not sure if that is just a typical thing on a day to day basis.

Basically, my question is this - did I maybe test too soon? If so, when would you suggest I retesr and with a digital again or dye test? Also, just to make note, my cycle lengths have been varying between 29 and 30 days.