After having a miscarriage a few months ago, my husband and I have been trying for our second baby. I had some brown spotting 3 days ago and assumed it was the start of my period. However, no more blood came. I did a pregnancy test this morning, which appeared negative. I came back to the test about 30 mins later to put it in the bin and noticed a line. Do you think this could be a positive test or an evap line?