Horrid cramps and abdominal cramping

I am 6 weeks and 5 days - this is the 3rd time this has happened, it only happens at night but I’m not bleeding and it comes for only 10 minutes or so - but it is the absolute worst stomach cramp ever, bad enough to make me think the worst and I am having a miscarriage - but I’m linking it to constipation because I really can not use to bathroom, and everything else has been fine. Is anyone going thru this? What is helping you? Because those stomach cramps are NO joke! i am eating yogurt, and just bought more and got some fiber bars and fiber cereal to help but man... anything y’all suggest - please help lol