Oversupply?

Tabitha • First time mom💘 Baby Zoey due oct 21🕊🎀

I have a 1 week old and I am exclusively breastfeeding. I think I may have an oversupply of breastmilk, as I soak through a wash cloth every two hours, my baby seems very gassy and has been spitting up large amounts. She has bright yellow stringy/seedy poops. Is pumping a good way to handle this or will that increase my milk supply? I dont want to risk decreasing my supply in the event I end up not making enough for baby.