Sweetie, how many days past transfer are you and what HPT did you use? Are you going in for a blood test?
I so understand what you are feeling - but - if there is going to be a blood test, please wait before feeling that it is hopeless! Don't ever lose hope ... If I remember correctly, DH was open to donor sperm? Think about it - if this hasn't worked ... maybe you guys just need a break - it is such a nerve-wracking, taxing (physically, emotionally and physiologically) process ... I really want to take you in my arms and hug you!
You are both still so young - gather your energy ... discuss it ... but please don't give up!
You know - before we got our BFP now (and I mean, a BFP doesn't mean that I will be taking home my little miracle at the end, so I am still very cautious about it, even if I do feel good about it) ... we had a total of 88 eggs retrieved, 75 eggs mature and 56 fertilised (total transferred : 20 embryos) - so I really do understand what you are feeling, I know how hopeless it feels ... I wasn't prepared to give up yet (admittedly, I did say at the beginning of the year, since I will be 40 next year, if we don't have a pregnancy by the end of the year, then I am not doing this any more) and I am soooo happy that I kept going and going.
Please, you guys are still so young ... don't you give up your hope!
*edit* I just read about your Grandfather-in-Law ... I am so very sorry! Yes, there are some years that are simply horrendous, where you just don't know where to get the strength from to keep going (mine was last year - BFN in April, paternal Grandmother died May 10th, my Mother died May 31st, BFN August, Gallbladder out in September, BFN in December) - I literally burst into tears when it turned midnight to 2014, that that year was finally over, I was so relieved - the hope, that this year would bring something better. I wish you lots of strength Sweetie ... don't let it get you down - and we are here for you as best as we can be!!