My wife tested today for HCG after our IVF 2.8 was her beat on day 13 past 3 day transfer.......is it even possible for this to end well?

Probably not... Given that it's essentially 31 days after "LMP" (15+3+13), bhcg should be detectable by urine pregnancy test (which usually has threshold of 25) so if the HCG is 2.8, this cycle may not have been successful. You should discuss with your REI doc - see if there's any other reason and also planning for future cycle(s)