The morning after pill can in some cases work up to 5 days but the chance is small. That is the only thing.
pregnancy
No. Seven days is about the minimum.
No, it is not pregnancy, it has happened to me, its nothing.
It should
It is highly unlikely that ANY pregnancy test will be effective after just four days.
the female jaguar pregnancy is 95 to 110 days
Once a pregnancy is established, no. The pills can only prevent pregnancy ( though they are not 100% effective) if given the time to saturate your bloodstream and taken daily to prevent pregnancy. Taking the pills, if you haven't been taking them to prevent pregnancy, will not cause a miscarriage. I suggest going to a doctor.
The earliest signs of pregnancy can show as soon as three or four days in, if one is expecting one's period. Otherwise, one notices signs three to four weeks into the pregnancy.
Pregnancy test have to be taken a few days after sex for it to properly identify the embrio
It is possible yes.
Probably around six weeks.
Yes it is still possible. See a doctor.