TTC - spotting a week before AF due ... what does this mean?

Finally after a very long eight weeks I got my AF after my first MC. My husband and I started TTC this month and I have been spotting for the last 5 days. I am suppose to get my AF next Tuesday and can only hope the spotting is from implantation but don't know if it's just my cycle all messed up from the MC. I took a pregnancy test today and it came back negative but it could honestly be too soon. I can't help but be worried something is wrong but don't have anything else to go off of. Anyone else have any similar experiences or advice they can share?