I'm 6 days late for my period..

Hi ladies.. I'm just curious I'm 6 days late for my period.. Could I be pregnant? As my menses is irregular.. So I'm not sure I'm pregnant or not.. Been trying to conceive since last year but the results always make me upset.. I really hope this year I could conceive.. Help me please.. Just worried that my period is late.. But I'm having this low back pain.. Is it a sign of my period coming or is it a sign of I'm pregnant? I'm just wondering.. 🤔