Do you have to...

Do you have to have watery or ewcm to conceive? I ask because I seem to only have creamy/pasty white cm or I am dry(before and shortly after AF) I was told I needed to drink more water so I did and nothing changed I've tried doing where I take cold meds or special pills made specifically for cm to help produce fertile cm and still no changes... Could this be why I haven't gotten pregnant yet? How can I help my cm change??? Ugh why is TTC so hard and difficult!