Cramping

Hey ladies, can anyone tell me what your cramping has been like, or if you’ve been pregnant before what it was like then? i’ve been having some pretty bad cramps in my lower back, similar to my period cramps i get on the first day of my cycle. this is my first pregnancy so my doctor doesn’t consider me high risk and doesn’t think anything of it. i haven’t been bleeding or anything but i’m TERRIFIED of having a miscarriage so can anyone please give me some insight here 😩 thanks so much!