Oo normal yan, sis! Lalo na ngayon na 33 weeks ka na, ang breast tissue mo is really preparing for breastfeeding kaya talagang may changes, tightness, heaviness, lalo pag puno ng milk. A few of us moms experienced the same thing, especially kapag busog or bra mo is a bit tight pa. But if it's accompanied by redness, warmth, or sobrang sakit, better check with your OB na lang para sure, okay? Mostly it's just your body doing its thing, pero peace of mind is always good, lalo na ngayon.