Oo normal lang yan, mama! Ako rin nag-swell ng malaki around that time, sobra pang ako ngayon kaya expect mo pa yan lalaki pa until after birth, lalo na pag start breastfeeding. A few of my mum friends also went through the same thing at that stage of pregnancy, it's your body preparing for milk production, kaya don't worry. Just wear a supportive maternity bra na comfortable and if it's really painful or may unusual discharge, better check with your OB para may peace of mind ka lang. You're doing great, first-time mama!