I had one. I started bleeding and cramping really heavily at 6 weeks after my first ultrasound and ended up getting diagnosed with a SCH. I was basically on pelvic rest with no physical activty, which was really hard for me because I'm normally very active and had been looking forward to a "fit" pregnancy. BUT, on Tuesday I had my 16 week ultrasound and the bleed is finally gone!! I'm cleared to return to physical activty and just came back in from my first "run" in months. I say "run" because it was very slow and short, but after months of sitting on my butt waiting for this bleed to heal, it may as well have been an olympic event. I still feel scared and am nervous now that I did my first run that I will see blood today, but I'm praying everything stays good. It's a tough road and takes some of the excitement out of the first trimester (honestly, only within the past few weeks have I let myself even start to feel like I will actually get a baby at the end of this), but I do beileve that resting is key. I know there's conficting advice on this, but everytime I would start to think "ok i can try something" I would bleed again, so I think it's best to just suck it up and take it easy.