Hello thinking, I am so sorry you are going through such a worrying and distressing time.
I had cramps and bleeding at 7 weeks pregnant and sadly for me I went on to miscarry. My heart hadn't completely given up hope by the time I was scanned but my head was pretty certain it was going to be bad news. The cramps were pretty painful, the bleeding bright red, and I had lots of my usual period symptoms (back-ache and weird sensations in my legs etc).
However, thankfully, for every story like mine, there is another with a happy outcome. I do hope yours will be one of them. Unfortunately, only time will tell and the waiting to know is so very hard.
In the meantime, take really good care of yourself (lots of good comfort food, plenty of rest, cuddles from your partner etc) as you will need to keep your strength up whatever the outcome. Perhaps you could also use this time to stock up on some essential items (strong pain killers, thick pads, chocolate etc) just for peace of mind's sake and to think about any practical plans that may need to be made (time off work for example).
My sonographer was very kind - I couldn't have asked for better treatment - and the nurse who talked to us after the scan was also lovely. However, waiting for the scan was tough as we were waiting with happy smiley couples having their 12 week scans. I found playing a crappy game on my phone helped to keep me from sobbing.
Sending lots of best wishes your way, I hope you manage to get some sleep tonight and have a physically uneventful Sunday. Fingers firmly crossed for Monday.