So I have been on the pill for almost two years but came off it a week or two ago because I thought it might be affecting my mood. But now I really need to delay my period in a few weeks but I wasn't sure if I should take Norethisterone or go back on the pill to do this? Because I haven't had a period since I came off a few weeks ago so I don't know if they will be very regular and stuff so I'm not exactly sure when I would plan on taking either of them? Also if I do go on the pill again, how many days will it take until I will be protected against pregnancy?