I had this problem with my last pregnancy as well. I lost that baby and it feels more like years ago instead of months and here I am again unsure if this bleeding is implantation. Normally my period comes like the bucket over Carrie's head at prom. I had some cramping and thought crap I guess not this month. There was a little dark brown blood. I assumed maybe because I had been asleep it was pooling inside and thus the color. I put in a tampon and after 2 hours there was barely anything on it, usually I'd of filled it at the beginning of my period. The cramping disappeared and then came back later and left and now is back again. I've barely bled into my pad, I've worn the same one all day. Two times I went to the bathroom and passed blood but never a clot. (I used a plastic fork to move it around to see if it was gathered blood from my sitting or not and it all flowed away like blood.) Some is brown and some is red or maybe pink. With the brown it's hard to tell. In the toilet in looks red. In my pad it is brown. When I wipe it is pink. I took a cheap test today but it was negative. My last pregnancy I couldn't read my line until after bleeding had begun. I'm trying not to get my hopes up but I'm hoping people can tell me something so I'm not wasting precious money on these expensive tests.