constant abdominal cramps without bleeding

I have been experiencing frequent cramps in my abdomen. The cramps come and go, and they're not accompanied by any bleeding. However, they're quite uncomfortable and worrying me a lot. I've been doing some research, and I've read that abdominal cramps can sometimes be an early sign of miscarriage, but I'm not sure if that's what's happening to me. I haven't had any bleeding, which seems to be a common symptom alongside cramps in miscarriage situations. Anyone has similar experience?