TTC for 1 year & 6 months...

Xina

I had my period last month 08.16.2017 and was due to have my period around 09.14 or 09.15. It's now 09.19.2017 and I'm 5 days late. I've been having light cramping and feeling tired for the past 3 days. Today I started spotting light pink only when I wiped (09.19.2017). I took 2 test and both came out negative. Is this just my period? Or could I be pregnant?