Transfer related - important info

I just found this on line:

I am experiencing spotting before my scheduled pregnancy test. Is this normal?
Spotting during your 2 week wait could mean a number of possible
things:
an embryo is implanting, one embryo is implanting while another is detaching, your period is arriving. Please always call your clinic if spotting occurs. You should always go ahead with your clinic's pregnancy test even if the spotting is heavy. There is really no way to tell what is happening until the pregnancy test gives the clinic some indication.

[Tima]

yes it is true, no way of telling untill the blood test. I spotted pink day before the beta, then few days later was brown. Last Wed and Thur had more brown spotting and was getting worried, on thur actually had red. yesterday again red spotting and passed a big clot too, and yes it was just a clot, I actually got a pair of gloves to feel it (sorry tmi) Doc says nothing to worry about. And it is so hard not to worry. I try to keep my mind busy so not to think about it.
you are in my prayers.