My period is 12 days late I did two tests both were negative my periods are usually regular never more dan 6 days late

Wait until your next period is due. If you skip it, try testing again.

When you're testing make sure to use first morning urine, it's less diluted and therefore more accurate.

If you don't want to wait (which is understandable) consider getting a blood test at your doctors office.

Had tiny spot blood this mornin thought they could be cumin but nothing since.. only 17 so I'm worried