Could I Be Pregnant? Community

Hi all!
I'm hoping you can help give some insight or experience into these questions.
My husband and I went through a miscarriage on Nov. 1st, 2012. Since then I tested that all hormone levels were gone (or, >5 which is the most they can tell you at the doctor).

I had a period in November at what would have been my normal time, but had some grey tissue passing in the period which I assumed was the rest of the "cleaning out" proces from the miscarriage.
I also had my regular cycle in December as normal. (Although! I took one Clear Blue digital test in December before I started that gave a false positive result)

I am set to have my cycle tomorrow, and have been feeling very tired, slightly naseaus, etc. I have taken three different brands of pregnancy tests in the past few days and they all showed a faint positive line. (!!)

My concern is that I have had some spotting (pink/brown, and sometimes very lightly red mixed in with discharge). It's very light and nothing at all like a normal period, although I have had some cramping. (Which is of course exaggerated by me being so hyper-focused on my body right now!)

This spotting has been for the past two days. Have any of you had a similiar experience and been pregnant?? I'm hoping beyond hope that I truly am pregnant, and that the baby stays strong and healthy this time. I'm sort of afraid to hope though, with having one false positive last month.

I will make an appointment with my doctor if I haven't started by next week, but would love to hear any advice or input before then.
Thanks!