questions!

hi! i had my period February 9-13 and had sex on the 14th (with a condom) and took a plan b like immediately after (context: 2 extremely paranoid people having intercourse involves extra extra precautions lol) and on the 19th (5 days later) i had gotten my period (?) again from the 19-22 — im just curious if this actually counts as a period or not..? It was just like my normal flow and everything, not a small amount of blood by any means. Is this gonna interfere with my March period or did it already happen? Any help is extremely appreciated, thank you!