Hi i am so pleased that i checked the unanswered messages section.
This exact thing happened to me april last year. On my first ivf cycle i bled afew days before test date, they made me carry on with my progesterone because clinic said it can happen.
I got my +ive and the nthey said had to wait for scan as too soon. I went to babybond for scan to see if they could see anything. they said at that stage that blood was not coming from uterus but couldnt see anything as too soon. had another a week later as bleed continued, found one embryo and bleeding coming from outside uterus. it finally died off when the progesterone stopped and i was about 12/14 weeks. my consultant said it may have been the progesterone but was never very worried as it was always outside the womb. a nurse said it could have been because i had scar tissue from removal of abnormal cells they basically never knew but a few months later a got my ds.
I did have 2 put in and only one stuck but who knows if it was that or anything else that they discussed. it was hard full of anguish but it can be ok!!!
so please put your feet up, dont make beds dont stretch up high or bend to the ground.( all old wives tales but followed all of them 
no hot baths either. or lifting heavy shopping bags
My bleeding always slowed down if i put my feet up and always came after a school run when i was up making dd her tea (non ivf baby who is about to be 10) i also swopped to tesco/asda delivery and got them to bring shopping into kitchen and put it on surfaces so not bending.
Sorry i am rabbiting on 
i do that alot. maybe its good to get things off my chest.
i carried on testing for days with the clearblue digital which shows the change in weeks so you know hormones going up.
can also go to early pregnancy unit at hospital and they can do hcg blood tests every 48 hours to check its going up.
i do hope all goes well for you and your little beans are ok!!!!
Lots of hugs