late ish period and cramps?

I have a somewhat irregular period usually 26 days. Today is day 27 no period but I'm moody have mild cramps and lower back pain and kinda sore muscles. All of this is normal for me on my period. Also very little or no discharge. I know you can't tell me if I'm pregnant and I should just buy a test soon. But I'm kinda freaking out and wanted a second opinion on all this. I kinda doubt I am but it's possible I suppose been using pull out method