Hi Lewis
Don't you just wish we had LED lights on our tummies that turned from red to green when we were pregnant!?
You're doing well holding out from doing a test! I had already done 4 hpts by the time I got to 13dpo!!
Have you read about implantation bleeding? day 13 is a little on the late side for it, but its definitely something to keep in mind.
and some people bleed a bit throughout pregnancy.
But maybe by this morning you have already found out one or the other, all the best as you process whatever the outcome was.
Best of luck for the future