Uy, mama, please go to your doctor or OB agad, kahit 3 weeks delayed lang, the spotting with coughing needs to be checked out properly, okay? Hindi ko ma-say kung ano ang happening, but a healthcare person needs to see you in person para sure na okay ka at baby mo (if may baby). A few of us mums have had delayed periods with weird symptoms before, and honestly, the peace of mind from getting checked is worth it. Don't wait pa, lalo na may dugo involved, go na!