please read and give me advice !!!

i’ve been on the birth control pill for six months now . me and my boyfriends condom broke on the 28th of november . i took a plan b out of total freak out and it ruined my cycle . i ended up not having a period for the month of december . it finally came on the 15th and 16th of january . ( those are my two days that it’s supposed to come ) . in the picture below , this was the heaviest it got . was this just a light period because my period is trying to get regular ?? please please i need all the answers i can get to ease my mind . ( i only used one panty liner for the day and so that’s why it’s brown because it’s kinda old )