Sis, I feel you, postpartum rashes can be so frustrating, lalo na ang kati! A few of us moms experienced similar things after delivery, kasi ang hormones at stress sa body talaga nakakaapekto, plus if may moisture from lochia or if ang bra/underwear ay snug pa. Since your OB said to observe, that's fair, pero if the rashes are spreading, getting worse, o may discharge / warmth sa area, definitely go back na agad kasi sometimes it can be a heat rash, fungal infection, or contact dermatitis from pads or soap. In the meantime, keep it dry, wear breathable cotton, at avoid any strong products muna, hopefully it settles soon!