nausea

I'm now 5 DPO my boyfriend & I BD on the 16th & 19th . I ovulated the 20th.. I'm feeling really nauseous tonight and I was a little bit last night to.. not really sure what my body is doing rn. Also my CM is really really thick, cloudy, and sticky, that's never really happened before. My boobs are a little sensitive. What could this mean? I can test in 4 days but I don't wanna get a BFN again ): really hoping this will be my Christmas gift as a BFP . I just want my rainbow baby