I want to say first good luck
I had the slightest of bleeding the same day my period was due. I was pretty sad since I had been wanting to get preg. I had never heard of implantation bleeding until after I got a positive test.
I was due to start my period april 16 and that night I did get the light brown kind of discharge, which is usually how my period starts so I figured that was it. I was concerned when nothing happened the next day. No period no discharge, I decided maybe it was stress and waited 3 days April 19th I took a test and it showed positive. I had taken one before I think maybe the 15th because I wanted to be able to tell my mom on her birthday (the 16th) and that one said not preg. That is my experience, I think that may have been implantation bleeding.
I hope when you test (and tomorrow sounds like a good day to do it
) you get the answer you are hoping to get