Idk what it is either I get it an I didnt even no how to describe the pain to my boyfriend I was saying its cramping but yea some days its 1'check then the.next it was just the other then the next it was both felt like I was sitting down all.day lol maybe it's just stretching or something
If it's getting worse, I'd advise you to seek help from an Physical Therapist. Mine has helped me tremendously now, but she said I would have seen greater relief if I had gone when I was pregnancy and shortly thereafter.
I agree that it sounds like sciatica which is compression on a nerve that runs through there. It can definitely happen during pregnancy. Try some light stretching of your lower back. quads and hamstrings. That can help. You can also try a heating pad. Hope it gets better.
Sounds like siatica. ( siatic nerve pain) I get it more on one cheek.