
Ovulation is typically four ish days (different for everyone) after menstruation and plan b doesn’t actually work during those times (yeah.. we don’t get told that) but using plan b and not being on birth control and will make your period be irregular, for the most accurate pregnancy test it would be two weeks after last intercourse (as sperm can cause a false positive)
Solid chance it changed your regular menstrual cycle! Plan B prevents ovulation (so if you’re already ovulating it does nothing…) therefore can delay the period of even make it early and cause the spotting ^^ Def recommend tracking your period so you know your ovulation since you’re not on birth control. You should regulate out soon though
It could be, it could also be breakthrough bleeding where your period was suppose to take place but didn’t due to the plan b, at the same time people can spot during implantation of pregnancy (but in your case, it doesn’t seem like it, just for future reference and why I recommend pausing on the sex a bit and taking another test) but you sound in the clear!