Stress
Yes, this is normal. Intercourse doesn't effect menstruation at all so it has no relation to your period, when your period starts is dependent on your menstrual cycle - sex doesn't effect this.
I'm really trying to find the same info but not with much success. If your dog goes in to heat and bleeds her normal week-ish period and stops and then starts bleeding again a few days later - is this normal? I would really appreciate any advise...
Its normal to occasionally miss a period. About 2-3 a year are missed on average.
Yes, it is normal. It can appear at anytime, as early at age 10, or later at 16. It can even appear earlier or later. If in doubt, contact your doctor.
Roughly 14 days later - when your period starts
Normal
Yes.It is normal but it is not your true first period. It will come later.
Yes it is normal. If you exercise more then you will have it later . And the cramps it just depends sometimes ya' have them sometimes ya' don't ... But yeah it is normal....
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February being a short month should have nothing to do with your period start date. So if your period starts late in March, it is not as a result of how many days are in February. Your period should come when it is due; if it is later than usual, you might want to take a pregnancy test or consult your doctor.
Had my normal period dec 6th thru the 10th had sex on the 11th again on the 15th started light bleeding on the 20th for 3 days .
It could mean almost anything, including "nothing at all." See a doctor.