It's fine to start the next ring early, and fine to leave the old ring in for 24 days. Doing so does not increase the risk of pregnancy. You may have unpredictable bleeding when trying to skip your period by skipping the ring-free interval.
Yes
If you insert NuvaRing eight days late, you are at risk for pregnancy. Use a backup method for at least seven days. Timing of your next episode of withdrawal bleeding will be unpredictable. Take a pregnancy test if you had sex that wasn't protected due to the error in NuvaRing use. Consider changing to a method that doesn't require you to do something every month.
If you've been without a ring for less than seven days, and used the ring correctly in the prior month, there is no need for a backup method when you start the next month. If you were late putting in the new ring or made some other error, you'll need to use a backup method, like condoms or abstinence from vaginal sex, for the first seven days of the new ring.
The question is a little confusing... You left it in for the 4 weeks so that you could skip 1 months withdrawal period. Then you took it out for 1 week to have the withdrawal period at the beginning of the next session. Did you reinsert a new ring after the 1st week of the new session? If you did not reinsert the ring after the period that you mentioned and you have had unprotected sex your period may be late because you are pregnant. But it is also possible that your body is still adjusting to the ring. Refer to this from the Nuvaring pamphlet/websight: You must check for pregnancy if: 1. you miss a period and NuvaRing
If you leave out NuvaRing for a day, replace it with a new ring and use a back up method of birth control, like condoms or abstinence from vaginal sex, for seven days. It is best not to remove NuvaRing until the ring-free week.
Your ovulation is from one side each month, and each ovary runs on its own cycle. Usually they match and you get your period at the same time each month. This means that if your period is every 30 days, your right ovary drops an ovule (egg) this month. 30 days from now, your left ovary will drop one. 90 days from now your right ovary will activate again and drop an ovule. And so forth. However, if one month you ovulate early, meaning you get your period early a few days, the next month you will ovulate on your original schedule on the opposite side, which means that period will feel late to you, when in reality it is running on its own proper schedule.
there are 275 days.
Seven.
A fortnight is a period of two weeks, or 14 days. In a typical month with 30 days, you can count two complete fortnights (28 days) and have 2 days remaining. In a month with 31 days, there are still two complete fortnights, with 3 days left over. In February, which has 28 days (or 29 in a leap year), there is exactly one fortnight, with the remaining days being fewer than another full fortnight.
There are 4 days in a year,and 3 or 2 days left.
there are 7 days
Not counting today, 8.