Mini pill

I am currently taking the mini pill but I took it late a couple of times .I had my period in January and I am also breastfeeding so I haven't had a period in 2 years I had sex couple of times .So for 2 days I had pink and brown spotting and it stop. And my period is in 3 days . I been having cramping on my left side and am not sure if I have implantation bleeding .I am just worried that something might be wrong because I was on the pill and I might of got pregnant. I am hoping I am ok . Can anyone explain what going on . If I got pregnant will the baby be ok .