Hi Dr, am 6w3d pregnant and I had my last u/s at 5w4d, the gestational sac was seen with good decidual reaction but no foetal pole seen yet. I feel slight cramping in my tummy and I have to visit the toilet after almost every meal, and my excreta is dull coloured, looks like dark green or even black. It gets really tiring, have a lot of nausea and I feel constipated sometimes, easily tired and irritated with these head ache that never goes. Are these signs all normal, especially the ultrasound? Thanks