Implantation bleeding is not all that common bu happens. It has been described to me as faint pink or red blood spots that are very brief. Discharge, I'm not sure would relate to implantation. However, hormonal changes (that a pregnancy may have) can result in discharge. If you itch at all, you may also have something like a yeast infection brewing. Any pain or anything? And brownish red discharge is older blood and could be the result of spotting which can happen sometimes.