If you got your period and came off had unprotected sex 2 days later and came on your period again the following 2 days what does that mean

Difficult to say: You may have had some irregular bleeding but pregnancy can't be ruled out. If you do not want to be pregnant you should take a morning after pill. These need to be taken within 3 days for Plan B or 5 days for Ella (ulipristal acetate). If you do not want to be pregnant you should see your provider to get on birth control: pills,IUD,Nexplanon, etc. And I recommend using condoms until then. Take pregnancy test in 1 week

Irregular bleeding: or bleeding between periods is what you have , it is not another period that you had in a month. This means that you may have an infection including std , hormonal imbalance , had trauma to cervix or vagina during sex. See your Gyn. for a check up. Good luck!

Extension of period: It could be that your period was not quite done yet. Condoms are always recommended to avoid pregnancy and sexually transmitted diseases. If bleeding continues or you do not get your next period, see your doctor for evaluation.

Nothing: You may have had some trauma during intercourse and some bleeding. You could also have irregular period which is not unusual at your age. Be careful to practice safe sex and use condoms in future.If you did not have a full period and have been sexually active during the previous month, it is prudent to get a pregnancy test done