Running I had terrible pains a week after my ERPC, was terrified as I'd hardly had any bleeding. After very sharp pains for 2 hours, writhing around on our bed because I couldn't sit up properly DH turned to google and started asking what my pain was like as we though it might have been the rest of the miscarriage about to start or even appendicitis! Turns out it was really bad consipation
once DH had managed to get up off the floor, dry the tears from his eyes and stop laughing, he nipped to Tescos and got some laxitives. The relief was almost immediate! Hope you're feeling more comfortable today.
Jo I also just finally had my BFN, last Saturday. I was expecting it, and was glad my body was sorting itself out, but felt so deflated at the single line. Felt like I could do an amazing magic trick bringing up two lines when I was pregnant 
As for me, I'm pretty sure I ovulated yesterday. CM was creamy today after lots of EWCM yesterday and a few other O symptoms. It really threw me and have come home and had a cry to DH this evening. It's only CD17 after my ERPC! Lucky we finally bit the bullet last Friday and have got a few sessions in since then, but the whole TTC stress has hit me full force again. Still determined to NTNP and just have as much sex as possible, but I'm terrified of it taking another 8 months like the last one did. And also scared of getting knocked up again this cycle because so many people know about the ERPC and it would feel a bit weird having people know we were back at it so quickly! 