Aww mama, I know how scary that can feel! Please see your OB as soon as possible, kahit 9 weeks pa lang kailangan nilang i-check yan properly, especially since masakit. Hindi kami dapat mag-diagnose dito, but your doctor will know exactly what it is and what's safe for baby.
A few of us moms had skin concerns during pregnancy at medyo worried kami, pero the doc put our minds at ease quickly. Don't wait, better safe than sorry, lalo na ngayon. You've got this, and your OB will take good care of you! Sending love.