Hindi lang buntis ang may yellow stain sa underwear, mama, normal yan kahit hindi pregnant, depende sa hormones, discharge, at kung ano ang nangyari sa body mo that day. Yellow discharge is usually okay, pero if it's super thick, may weird smell, or iba-iba ang kulay, or if you're pregnant at worried, better check with your OB just to be safe lang kasi sila ang expert talaga. A few of us mums were paranoid about this din, pero most times it's just normal body stuff, hormones, sweat, lahat yan. Don't stress too much, pero don't ignore it din if something feels off!