7 weeks pg cramps and tightness...

Michelle • 4th and finally Baby
So by all means this isnt my first rodeo since this my 4th baby. But I don't recall feeling so many cramps and tightness with my other 3 girls. To be exact I'm feeling tightness and I got a shooting pain on my left side and mild on my right. I already know it's not ectopic pg since i got an ultrasound at 6 weeks. But I'm really worried however. Any thoughts...