3-5 days before ovulation, your CM will be clear, transparent, abundant, and very very stretchy (you can easily stretch it 3-10inches). Before and after ovulation cervix is low and just around ovulation it goes up high. So high that you may only be able to reach it w/ the tip of your middle finger. For me, low was about 2inches in (less than middle of the 'midlldle' finger). Also it will feel very firm after ovulation, but around ovulation it will feel very soft, like your lip.
I just started myself, so need to do it for at least one month to know what's 'normal' for you. Hope the herbs help to bring the ovulation on. If not, I think clomid is supposed to work really well.
Usually, you don't feel ovulation, unless it's typical for you to feel some cramping pain, on one side of lower abdomen.
Good luck, hope this helps. I know all the info is initially really overwhelming.