Severe cramping!

Rebecca
I am 6 weeks pregnant with my first and I have been having debilitating cramps for three days now! I've seen my ob and everything looks good with our little nugget, thankfully, but I am in so much pain. It comes in waves, and when it hits I can't stand. Definitely worse if I'm active at all. I've pretty much been laid up for three days now. I know cramping is normal, but has anyone else had it this severe? I also have interstitial cystitis, and am wondering if that's contributing to my pain... Just looking for some insight. At this point I've had to call off work because of it.