is CM a MUST ?!!!

i Been having a few pregnancy symptoms and i am not having any CM unless i stick the tissue inside me ? or if i pee it goes into the toilet , just a white creamy kind . its not alot like i keep reading i should have , my AF is due 17th and im curious ? my breast dont hurt just heavy . and im having shortness of breath , mild cramping , very itchy skin thats leaving spots on me,