On the mini pill but I think I'm pregnant

I'm currently on the mini pill my last pack I did so good this pack not so great. I know it has to be taken same time every day. But is it ok if I miss it by 5 mins. I've had 2 or 3 pills I've missed by 5 mins then I missed a pill on July 4th then I went out of town and sat July 6th I felt crampy and went to the bathroom and had brown spotting in my underwear and just a tad when I wiped so I thought I started. So I changed my underwear, put a pantie liner on and I didn't have anymore spotting so then I thought implantation bleeding. I'm 4months pp btw. I just want to hear others stories that may have gotten pregnant on the mini pill