I'm in the same boat. I'm only 5 weeks and have a bit of a dull ache (more discomfort than pain) and some brown spotting. The doctor can't get m in for and U/S until next week and so just to be on the safe side has put me on bed rest until my scan. Lying around doing nothing all day just gives me more time to worry of course. I have read this can be normal but it's my first pregnancy and I'm a worrywart.