Yes. That is possible. Specially so when you have long and/or lingering periods.
Yes. Sort it out mate.
good new is you had your period meaning you are not pregnant.
No, the point of birth control is so that your body will not ovulate so that you will not get pregnant. Your period is withdrawal bleeding, which is not the same as regular periods.
For every woman it is different. If you have a 28 day cycle then typically you ovulate (release an egg) 14 days after the first day of your cycle. Then, we assume that four days before to four days after THAT day are fertile days. That is when a woman can conceive.
Yes it can. Four days is not very much.
Doctors start counting how long you are pregnant based on your last menstrual period. The thing is, you usually ovulate about 12 to 14 days after your period starts. So you are actually really only 12 days pregnant if the only sex you had in the past 3 weeks was 12 days ago; the doctor is just adding the time from your last menstrual period to now because the actual day of ovulation is not known.
pregnancy
Four weeks would be near to the next cycle. Considering that the average woman has a 28 day cycle ( give or take a few days) this means on or about day 14 she would ovulate. In that time frame of day 12-18 she could get pregnant since sperm can live in the uterus for 5-6 days.
No, a person cannot occur four days after the previous one. Menstruation is part of the menstrual cycle, it's simply not possible for your entire menstrual cycle to occur in just four days. If you're bleeding four days after the end of your last period it may just be the end of your period, mid-cycle bleeding, or the first bleeding may have been something else other than menstruation.
It is possible yes.
Four days
It is possible that you could have mistaken your period for implantation bleeding. You should probably consider taking a pregnacny test.