doctors appointment?

So for the past 7 months weekly I’ve been getting cramps in my pelvic area, it feels like I’m going to start my period (we all know that feeling) and I never do apart from one of the weeks out of the months. I’ve had a scan on my stomach before that’s indicated no issues but this was before it started. Is it worth asking to get it checked out? Or is this a completely normal thing? some weeks it’s more intense that others and I literally have to keep on checking for blood.