Quoting White Chocolate Milk:" Most definitely. BFing can cause major issues with throwing off your cycle as well as having just had ... [snip!] ... with taking it and try not to miss your pills to ensure pregnancy isn't a possibility while your cycle is working itself out."
Quoting meggymama:" Did you have trouble with condoms before? If its only PP then it might be worth getting checked over, ... [snip!] ... or so (but so can pregnancy) if you're using the thing you said though that will help (we dont have that here so i dont know) "