I am so very sorry to hear that you are going through this. I do hope though that this change in symptoms turns out to be all ok.
At 5 weeks I started getting terrible cramps and bleed bright red blood for 3 days. I was sure I was miscarrying. The bleeding stopped but the cramps stayed and at times it was absolutely worse than my usual period cramps.
We finally went for more bloods and a scan and had all great results. Baby was strong and looking good.
Even with the bleeding gone I continued to cramp up until a few days ago so the cramping isn't always bad news. Especially if there is no bleeding.
Hope your appt goes well. Take care.