What causes irregular period/ late ovulation at age 21?

Since your period came later than normal then it basically reset your whole schedule. Most women ovulate 12-16 days after the first day of their period. Ovulation doesn't occur every month on the exact same day, even if you have regular "on time" periods you may still ovulate on a different day.

It looks like you normally have 30 day cycles, so this is what I found. Your most fertile days would have been between January 4th and 11th, so if you had sex during any of those days then chances are you could be pregnant. When did you take the pregnancy test?

Take one tomorrow if you haven't had one recently or take it in a week if you just took one. It does sound like you could be pregnant, and you will have to wait until you get a period or a positive test to know for sure. I hope all goes well.

No but a late ovulation causes a late period. Ovulation comes BEFORE the period. So your cycle would look something like this Ovulation (on time) Period (on time) Ovulation (delayed) Period (delayed) And no you don't ovulate at the same time like clock work all the time.

There are times when ovulation could be delayed. Especially by stress.

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