I will be 4 weeks pregnant tomorrow. A couple days ago I noticed when I wiped there was brown discharge (im hoping its just old blood) this also came with a few blobs of mucus - sorry for TMI. This morning I noticed that instead of brown discharge there is now red blood. Its not heavy enough to go onto a pad but its there when I wipe. I am also having some cramping and I am wondering should I be worried about this or has anyone else had a similar experience?