I'm scared!

I just took a wondfo pregnancy test just to see the second line again, I'm 8weeks 1day. I know I'm crazy but I have about 10 sitting in my bathroom so every so often I just wanna see that line. It's a very very I mean VERY faint line! Almost neg. the other day I took one and it was positive but not as dark as the one from about 2 weeks ago. Is it possible to be this far along and have your levels drop to show a faint positive? I'm not cramping, bleeding or anything. I still have a little bit of symptoms. I'm gaggy all the, I don't really have any cravings, and my boobs aren't that sore but they haven't gotten that sore. My first ultra sound is Jan 9th. What should I do?!?!