I had spotting with DD and everything was great with her. You want a quantatitive HCG done - the qualitative just gives you a yes/no answer. You'll also have to go back 2 days later for another quant HCG because 1 test doesn't tell you anything. The thing you want to see is that the # is going up by at least 60% (they prefer doubling though). You can also ask to have a progesterone test done and that can give you a little idea if the pregnancy is healthy. They want to see a level of at least 15 to sustain a pregnancy....if it's low, they can give you supplements to fix it.
For example, at 13 DPO my HCG was 38. At 16 DPO (3 days later, but it ran Fri - Mon), it was 157. 2 days later, it was 372. 2 days later it was 967. So, don't think that just having the 1 test done will give you all the answers. Waiting is hard, but it's worth it.
Having said all of that, I'm sure everything is OK. Spotting, as long as it's brown or pinkish, is considered "safe." I've even heard of people having bright red spotting and the baby still being OK. Try not to freak (although I know from personal experience that it's easier said than done!!!). If you have any more questions, I'll be happy to (try to) answer them for you.
