need advise

so I came off the mini pill on the 28th of July, I was only on it for about a month. I had a withdrawal bleed that day for the next 3 days. No period since then. My breasts have gotten fuller and my nipples are bigger literally over night. I've had mild cramps but nothing like premenstrual. CM is also thick and white. My expected period is this Friday coming. is there a chance I could be pregnant?.. testing tomorrow