First time mum currently 37+5 had Braxton Hicks on and off today and went to the loo and this is the first time this has come out is this the start of losing parts of my plug ?

Shell • One beautiful 👼🏻 in heaven Charlotte Rose 6th of April 2018. Rainbow baby boy Spencer came on his sisters anniversary 6th of April 2019🌈 👶. Pot of gold Evelyn 17/7/23🙏High school sweet hearts 💕 16 years ❤️❤️ Fur Mummy to Napoleon