I'm going to assume your 2 weeks together coming up will be in the Philippines for the purposes of what I am going to say here:
Save every boarding pass, hotel receipt, AirBnb receipt, etc
Do things with your fiancée's family and take photos of the two of you with them
Find a few "touristy" activities / locations there in the Philippines wherever you guys are going to be and take pictures of the two of you in front of the signs/landmarks, etc.
Save those call logs / texts and put together a timeline of the relationship using samples from them
Each of you write your story (Jaycel and I did this) - The consular officer doing Jaycel's interview at the embassy mentioned a couple of things from our stories during the interview.
"Front-Load" your I-129F with all of this evidence. USCIS just requires proof that you two met in person within the 2 years prior to your filing the petition, your legal eligibility to marry each other and your letters of intent to marry but if you include all of this evidence in the petition, once approved it all gets sent to the embassy. As you can see from the item above, it's all available to the consular officer