Ladies please helpppp!

TTC#3

Ok so my period was dues on the 29th and it still has not shown her face so I tested yesterday n this morning n they were both negative I used a digital Clearblue idk what to think I have been off the birth control pill for 4 months n my cycle has never been late always 27 day cycle so could I be pregnant???? Help me cause as of today I'm 3 days late