Sayang, please see your doctor or go to the clinic as soon as possible, kahwin, cramping dan bleeding a week after the scan should really be checked out by your doctor to make sure everything is okay. A few of my mum friends went through similar situations, and while sometimes it can be normal, it's not something to wait on or guess about lah. Your doctor needs to assess you properly, could be a few different things, but only proper examination will tell. Don't delay this one, ya? Thinking of you.