10 Days late

Dina

Hi ladies, I am 10 days late for my period. I have been getting irregular periods since I removed Skyla in November so I am not even sure that I am 10 days late or not. I tested when I was around 6 or 7 days late and got a BFN. Should I test again? I have had some heartburn and was a little nausous today. And and when do you think I should test?