Spotting

So, I'm about 12 DPO and I had light pink spotting this morning with cramps. Decided to just prepare myself for AF and throw in the towel for this month due to all my BFN. Well, I went to change and noticed a little bit of brown blood mixed with the pink blood again. It wasn't even enough to fill a panty liner. Am I getting my hopes up or could this be my rainbow baby??