Implantation or stressful month?

Chelsea • Currently engaged, with one 6 year old son and have been TTC for over a year with 2 MC. Hoping for rainbow baby!

Some background: So me and my fiance have been TTC our second child for awhile now including 2 MC in one year.

So my periods are always exactly 28 days between. This month I got my period one day early and only lasted one day with now brownish discharge. Not sure what to make of this and thought maybe some info would help. Thanks