Because you doubled up on contraception, it's more likely that you're just late. Spotting in between cycle can easily be from stress, not taking the birth control correctly, or stopping mid cycle. If you've missed a couple pills your birth control probably isn't very effective and could be causing your period issues. However, using condoms on top of this means you're probably not pregnant. Nothing is 100%, but two combined make it pretty close. Wait for a day or two and if your period doesn't come, then take a pregnancy test with your first morning urine. However, for now do your best not to worry.
Also, I had spotting last week, but was not due for my period until today.