Shine
I charted my fertility so I knew when I would be approaching my fertile window. About 3 days before I was supposed to ovulate I started taking Mucinex. Much easier than taking tons of plain robitussin (same ingredient). I also used a product called pre-seed which is the ONLY lubricant that is made specifically to mimic fertile quality cervical fluid. I have never produced good fertile fluid so the pre-seed was my answer. Don't use any other type of lubricant because they kill sperm (FYI). pre-seed is kind of expensive but you only need it when you're fertile. I also used OPKs just as another predictive measure.
As for early pregnancy symptoms - honestly I don't get any symptoms that early - but I "knew" I was pregnant before the test told me (I tested + on day 11). I don't start getting symptoms (like heightened sense of smell, sensitive breasts, nausea) till a week or 2 later.