Hello, I am 20. My fiancé and I had unprotected sex on the 25th or 26th of Feb. I started my period on the 11th of Mar. I have taken 2 tests both negative.

Tests are often unconclusively or just plain incorrect.

If you had sex, protected or otherwise, of course you could be pregnant.

You could take another HPT now or wait a week or so OR see a Physician.