Well... today was an okay day.. but??

Well.. on the diet/lifestyle portion of my life.. I did pretty well today. I also went for a nice walk with my hubby and our pups.. even though it was cold and my face was frozen and numb.. so I dont havve a lot to say about that.. but i am a little worried about the ttc portion of my life. I am on cd 12 right now, and last night I went to the restroom before getting ready for bed and when I wiped there was pink... I wasnt sure what to think but it happened all day today to not enough to need a liner or anything because it was just when i wiped. has this happened to anyone or does anyone know what causes this? I was a little nervous and i am even more nervous that it is taking us so damn long. I guess i am just not sure what to think anymore. I guess i have already started to get my hopes up because i am hoping that this is good news.. but i am also praying to God that im not getting my hopes up once again. This has been almost four years of hell. Everyone around me getting pregnant, when they dont want the child, cant afford the child, or dont take care of the children they already have. ugh!