Mini pill ???

I started the mini pill cerelle 2 months ago and no matter how many times i have been on different forms of contraception i have always been regular with AF but now i am 5 days late and still have no sign. I have taken two pregnancy test but both were negative. Now i am unsure of what to think i have really tender breasts , nausea, vomiting, fatigue and urinating more frequently. Any help would be appreciated?