Possible Miscarriage

I don't know where to post this so please don't get crazy on me.. I know this is a Long shot, but just curious if there are any similar experiences that have occurred. I was 2 weeks pregnant, everything was okay. Hcg level was low but okay since I was really early. Hcg level 17. Last night I spotted pink drops, and on call doctor said it could be normal or even implantation since I'm pretty early. I woke back up at 7am and had red blood. It's kind of like a period but lighter. Comes and goes. And some light cramping. Spent 5 hours in the ER they did more blood work and said my hcg levels were at 4.. they did do an internal ultrasound but they said it's too early to even see anything. They diagnosed me with possible miscarriage, and sent me home. I have to do more testing Friday to check my levels again, but am currently having back cramps.. I don't really wanna believe it's a miscarriage.. is it possible for my hcg levels to rise again? Any similar stories.. outcome miscarriage or baby?