Scam ???

Not sure if I’m being scammed or not! If anyone sees this & has done business with this person, please let me know! She offered to send a cashiers check & wanted my phone number- I’m new to Poshmark & was not sure if private email is an acceptable way of communicating & doing business. Thank you Poshmark community!!! ✨✨🌟💛🌟✨✨