Confused by my cycle-- help/advice please??

[HOpp123]

This is my second cycle TTC and it is flat out confusing me. Last cycle ended a week early, AF came a week early even though I thought my ovulation had truly matched up with when I thought it was supposed to be (CM, cervix position, etc). This month I started off taking my BBT every morning and recording it, I started taking Mucinex on Wednesday (1200mg, just the straight Mucinex) once a day. The thing that is weird about this cycle is, according to all of the prediction stuff-- I'm supposed to ovulate tomorrow. However, I've had no quality CM..no eggwhite anything and I usually do. I'm even taking Mucinex and I haven't had any noticeable cervical fluid at all. My temp also has been a little confused. Sunday-Wed my BBT temp was 97.18 consistently. Thursday it was 97.3, Friday down to 97.1 and then today all the way up to 97.6! Online predictors say my ovulation is due tomorrow, latest would be Tuesday but I'm just not sure because I'm not sure how to interpret my chart or my lack of useful usual symptoms. We've been using Pre-Seed just in case I am fertile and have no quality CM.  Any thoughts? I have the book TCOYF but I'm still confused =/ any advice/help would be great! thank you!