So I’m currently 33 weeks pregnant

This morning around 5 am I started having cramps don’t really know how to describe them feels like a stomach ache so I’m thinking it’s cramps now I’m really confused since it’s my first time being pregnant 🤷🏻‍♀️ but anyways I been having them like all day but it’s on and off but I been noticing them more in the afternoon because it’s bothering me and I don’t know if I should get checked out or something any opinions ? Currently still having them but it only lasts a few seconds or minutes What do you think could it be ?