You can miscarry without bleeding right away. 2 years ago I miscarried but didn't bleed for 3 weeks :( I'll pray for you!
You should go to the emergency room and see what's really going on.
Definitly ask your dr. In the mean time drink lots of water! You could be having cramps from not drinking enouph water..
Id go get checked or call your doctor. I had a baby pass away at 11wks and me not have any problems til I was 15wks they called it a missed miscarriage. Drink lots of water and eat healthy hopefully everything is ok.