Hi Turq,
IVF sucks so much, does;t it, to just gets in the way of life :( OTD vary in length from egg collection between clinics, when was your EC and when is OTD? I have both not been able to get to test day (bled before it) on first cycle and waited until test day to test and also tested early
When it comes to testing early, ideally, waiting until 14dpo is a good idea, but if you want to test earlier, i would get a first response test (as they are the most sensitive) and test no earlier than 12dpo as you 'should' get a reliable result by then. Does that help at all.
After my recent failed cycle i had DH's 50th bday party to focus on and organise, so it actually helped me not focus on the BFN and i was able to enjoy it. Although i did deflate big time the week after it!
Hopefully, you can test before and be celebrating your BFP at your dad's wedding too :) xx