I had bright red spotting on 8dpo, and put in a menstrual cup because I was sure that af had started (af was due that day because I didn't ovulate until cd21 of a 28-day cycle). When I took it out, there was a small amount stringy reddish-brown blood (sorry,tmi). I also had pretty sharp pains on my lower left side, and mild overall cramping. I was still spotting on cd9, and got my bfp at 12dpo after bfns on 10 and 11dpo. I'm actually still getting pinkish brown cm once a day or so when I wipe, but my doc didn't seem worried about it. I'm definitely pregnant, 6-7 weeks along now.
MyFavSurprise, are you temping? That can tell you a lot about your cycle. FX for you.
Texas, I've been having cramping off and on since before I got my bfp. Some cramping is normal, as your uterus stretches and grows larger. I think I read that it's sharp pains that are most worrisome. Your blood results will give the doctor a lot more information. Sending positive thoughts your way!