I’m 11 days late! When should I take a test?

Sylvia

I’m 11 days late on my period. I’m super scared to take a test because I don’t want it to be negative... I haven’t been this late in a year. My last period was on Jan 19th. When should I test? And how far along would I be if i was pregnant?

If I’m not late what would be the reasons I’m this late?