Wheres my period? Help.?

My cycles are always 28-29 days! My LMP was Feb 15th, lasted 7 days. had unprotected all month long, now I am over I think 2 weeks? I tested with HPT over 4 times and all said negative, Is it even possible to just get pregnant recently? or even ovulate way later? I checked my cervix a few days ago it was low and firm, felt like the tip of my nose, just checked today, its starting to feel softer and higher.. I'm not even stressed. What could be causing me to miss my period other then pregnancy? and is it possible I just got recently pregnant and its too soon to tell?