Pregnancy symptom?

So a little tmi but

I was supposed to have my period this week according to my tracking app. But instead since last week I’ve noticed brown discharge, sometimes it may happen that I’ll get it and then my period comes right after but this month the brown discharge went away and no period. Also I had a baby 8 months ago so my periods have been all over the place but I’ve never not got my period one month, the brown discharge did last like 4 days though and it was accompanied by upset stomachs and cramps. Has this ever happened to any of you ladies? pregnancy is very possible but I had way different symptoms with my first.