CM discharge is normal. Some girls just have more 'juice' than others, i guess you can put it. I for one am one of the girls with lots of visible CM. You don't have to worry about every little thing so much. Just get to understand your body and cycles a bit

and then everything usually falls into place.
There's so many other things that can cause lower abdominal discomfort, or discharge besides ovulation. Looking at your ticker, 6 days until testing, most likely your ovulation period is done and gone by now, unless you have irregular cycles and clueless when AF is supposed to be due. That could be why OPKs aren't giving you a positive. When did your last AF start? Do you keep track of it?