Just feeling it!?

Has anyone ever just felt pregnant? Like you just know deep down you are even though you haven't tested or missed a period? I'm on the pill (I take it good but not always perfect due to work and forgetting sometimes!) this month I just feel different it's hard to explain... But it's like I know I am but in trying to deny it.. Period is due Thursday! It's always clockwork so I'll know instantly if it's late. Anyone else have this happen? I do have a few symptoms as well!