Thin cm , maybe a dumb question !

Brittany • Christian Mother , & wife ,baby number two Due march 27th??
Im just gathering information , like I've been doing for about three months since we started this journey of TTC . I still have a head full of questions and a lot of them I've found that I cant find an answer to . 
​ So I'll ask this question Again and hopefully someone can help me . So we all know that EWCM is indeed fertile . I haven't had any EWCM since having my son in July , my first pp started back in January . I do notice a change in cm but around the time of ovulation it's not that I don't have any cm at all , because I do I have a ton of it .. But it's watery not like egg whites !  Is this too , fertile ? I can't ever find an answer to this question ? People always suggest cough syrup , EPO ect .. To help produce EWCM , or to thin cm ? But isn't watery cm considerd thin ?? I'm so confuse someone help me out here ..