DTD can affect how much Mucous you have as Semen looks a lot like EWCM. I find that EWCM is clear and stretching and DH leftovers are somewhat more cloudier.
Light cramping or what you are experiencing could be a sign of "O". But because your CM had a little bit of spotting, could also be a sign of implantation (egg implanting onto lining) if you have already Ovulated.

GL and I hope I have helped in someway.