Can having a bladder infection delay my period or cause me to miss it? I'm really scared because I have one and I've been drinking a lot of cranberry juice. But my period should have started a day or two ago. I'm currently sexually active and I don't use condoms but I'm on the pill. I'm really worried, I'm only 17 and I really need some help, please tell me it's possible because I don't know what I'll do if I'm pregnant