You need to wait a week and use backup methods because after only a week your body is not settled into the new hormones, and so it is not fully functional at keeping you not pregnant. Use some other method for the first little while, you'll be happy you did.

About the ovulation thing, im not totally sure about when you ovulate on the patch, if at all. Bc tricks your body into thinking its already pregnant, so you dont ovulate. But you do need to take a week off the patch each month so you still can have your period, dont mess with that.

Hope that helps.
-day

i had my period as normal i had a 5 day period on my 14th day i had a posotive ovulation test im now on day 20 and still getting a posotive a ovulation test (why is this).net

Now, I really don't know much about OPK, but its my understanding that you can get a postive for several days for a couple of different reasons.

A common reason is that after you have your first LH surge, your body for some reason doesn't get your egg to release (this can be caused by stress, illness,... the normal suspects for causing a late period). If that happens, your body will probably try again with another LH surge that may overlap with the first.

It's OK to happen once in awhile, but if this is something that happens a lot you may want to ask your doctor about it. But since you said you had your period as normal, I'm guessing you're usually pretty regular

Good luck!