Was it my period?

I’m on the pill and just recently I went through a TON of stress, also I accidentally missed a pill (I haven’t had sex recently). Well a couple days before my sugar pills and when my period was supposed to start my discharge started getting a little bit brown, I’m guessing from missing a pill and not realizing it? Well when I took my sugar pills this time my period was really light and it was mostly just like dark brown clumps of what looked like old blood and some red blood. And it lasted the same time span as my normal period does and stopped the same time my period would. Was that my period and it was just thrown off and light from stress and missing a pill?