Confused and need help

Love

So me and my fiance have been TTC another baby we have three together but they are all girls lol so we wanted to shoot for a boy. I feel like I should know my body by now but things are different since I took out my nexplanon in November. Well here are my symptoms:

Cramping around 7-9dpo

Completely nauseous all day

Breast are super full and sensitive with blue veins for sure!!

Constantly starving to death (or it feels like it lol)

Super drained during the day

Can't sleep at night

BBT has been up since ovulation

Now the weird stuff:

Cm is creamy/sticky/watery

Cervix changes everyday

3 days ago - firm low closed

2days ago - high soft closed

1 day ago - high firm closed

Today - middle firm closed

I don't know what to think and AF ISNT DUE FOR A WEEK....HELP!!!