Congrats! I've no doubt your GP will give you another form ... and another if you want ... to have a second (or more) BT.
If it makes you feel any better, I asked for about six BTs over a three-week period, and then I had a scan at 6w. Having said that ... I was lightly bleeding/spotting most of that time so I really needed to know if my pg was progressing.
Good luck xx