Oo naman, normal lang yan lalo na pag early pregnancy or malapit mag-period! Mine got super heavy and tender around week 4-5, parang sobrang sakit kahit light touch lang, at ang laki talaga compared sa usual size ko. If it's paired with nausea, fatigue, or delayed period, malakas ang possibility na pregnant ka na, pero the best way to know talaga is mag-take ng pregnancy test or magpa-check sa OB para ma-confirm agad at ma-rule out other things like hormonal imbalance.