The patch is changed once a week,
and the
NuvaRing once a month. An IUD can stay in for 5 years.
And using condoms is always a good idea.
If you don't take your pills properly, especially if you miss several days, you can end up with spotting. That's probably all that's happened, but if you miss a period (most pack instructions say if you miss two periods in a row), you should take a pregnancy test.