Being paranoid??

So last night I noticed some light brown discharge (tmi I know) and my low back hurt. I will be 10 weeks tomorrow and have my first appointment tomorrow as well. I went to bed and got a lot of rest. Woke up and haven't noticed it again and back feels sore but not awful. Am I just being paranoid? Is that normal? Luckily I have my appointment tomorrow but now I'm a little worried:(