Can you be pregnant on the pill?

Danielle
I take my pill regularly everyday. My husband and I never use protection. Of there a way I can be pregnant even with being on the pill?
 I don't have and signs really. I feel fairly normal. The only thing Id say is that I always feel bloated. I eat a pretty healthy diet. I just feel wacked. Not my self. 
​I am late on my period. Only 2 days. And I took a test it it came out negative. 
​Could it be a false negative? Is it possible to get pregnant and still be on the pill? Any suggestions?