Wendy,
I just happened to come across this today from:
http://www.babyandbump.com/assisted-conception/513810-symptoms-between-ivf-egg-transfer-blood-test.html
This is what happens in a 3dt :
1dpt ..embryo is growing and developing
2dpt... Embryo is now a blastocyst
3dpt....Blastocyst hatches out of shell on this day
4dpt.. Blastocyst attaches to a site on the uterine lining
5dpt.. Implantation begins,as the blastocyst begins to bury in the lining
6dpt.. Implantation process continues and morula buries deeper in the lining
7dpt.. Morula is completely inmplanted in the lining and has placenta cells & fetal cells
8dpt...Placenta cells begin to secret HCG in the blood
9dpt...More HCG is produced as fetus develops
10dpt...More HCG is produced as fetus develops
11dpt...HCG levels are now high enough to be immediately detected on HPT
This is what happens in a 5dt:
-1dpt ..embryo is growing and developing
0dpt... Embryo is now a blastocyst
1dpt....Blastocyst hatches out of shell on this day
2dpt.. Blastocyst attaches to a site on the uterine lining
3dpt.. Implantation begins,as the blastocyst begins to bury in the lining
4dpt.. Implantation process continues and morula buries deeper in the lining
5dpt.. Morula is completely inmplanted in the lining and has placenta cells & fetal cells
6dpt...Placenta cells begin to secret HCG in the blood
7dpt...More HCG is produced as fetus develops
8dpt...More HCG is produced as fetus develops
9dpt...HCG levels are now high enough to be immediately detected on HPT
But either way, just go & get tested again. I know the feeling of being disappointed again but since your doc also advised that, it'll be better to go along with him in this case. At least set your mind at peace. Just remember, never never give up (unless we hit age 50 of course) ... Hugggzz