6 weeks today and very sharp uterine pain?

This has happened for a few days but this morning it got so bad I had a hard time falling back asleep. It’s like sharp stabbing pains in my uterus. Has anyone else had this? It’s been 7 years since I’ve had a pregnancy last this long (chemical a year ago) so I don’t remember if this is normal or worth calling my doctor over. There’s been so blood at all. Just lots of stabbing pain. Help